Do you have a point where you just don't care anymore?

Douglas gave you the right answer.
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Also, believing in Jesus means being forgiven all sins past and future, and means going to heaven. All believers in Jesus still sin.

Jesus loves you and wants to bless your life freely :) Most of all, Jesus wants you with Him forever, and not in hell. The truth is that every belief except one will lead to eternal torment in the lake of fire for every person. Because nothing pays for our sins except the death and blood of Jesus, the sacrifice of Jesus that is already accomplished by Him . Jesus loves you! The truth is that Jesus is God, and Jesus died on the cross to pay for all of our sins in full, and then Jesus resurrected from the dead. Nothing else pays for our sins, not works, not deeds, not religions. So the only way to heaven and to avoid hell, is by believing in Jesus for eternal life (John 6:47), without adding any of your own works (Romans 4:5). Believe in Jesus to take you to heaven, and you will be in heaven, no matter what, guaranteed. That easy, thanks to Jesus! Tell Jesus that you thank Him that you will be with Him in heaven when you die, because you believe in Jesus! It is too late to be saved, after death

Pray to God in Jesus name and ask for guidance and protection. Read and study the Bible,
it will inform you about evil and God's protection.
God can save you and can protect you from demons.
Order the demons to leave you and to go back from where they came from.
Do this with the power and authority in Jesus name.

James 4:7 “Submit yourselves therefore to God. Resist the devil, and he will flee from you.”

2 Thessalonians 3:3 “But the Lord is faithful, who shall stablish you, and keep you from evil.”

Luke 10:17 - And the seventy returned again with joy, saying, Lord, even the devils
are subject unto us through thy name.

God took away the sins of the world. God paid the penalty for the actions of sin. The issue now is whether or not you believe the gospel, and repent.

It's all about your "heart" now. The heart you were born with is defined as being deceitful and wicked. You need the new heart, aka God's Spirit. You need to be born again.

This sin issue with your demons is a distraction, designed to keep you occupied with sin so that you are not made aware of the real problem and issue.

The gospel is a message of salvation being a matter of faith/belief only, in Christ, knowing what He did for you. He lived, died a most tortuous death in your place, and rose from the dead, showing His mastery over death.

Believe it, and the demons will flee.

Jesus is our Saviour/Healer/Deliverer/Redeemer/Friend -- There are no "ifs, ands, or buts" about it.
Now to whom do we look for solutions?

You do not shake the neighbor's fruit tree to dislodge the worms in your head.

So what do we do about these unwelcome guests? We rebuke them! Or you can ask God to get rid of them [1 Peter 5:7]; [Matthew 21:22].

We turn to prayer (we know that intimacy is not spatial but relational) while we desire a closer, trusting relationship with God; AND we stand on His Word and believe His promises.

As Douglas said. To me, you sound like someone who's grown up with a limited understanding of the word, yet never actually have sought out the character of God for yourself. Set the teachings you've heard growing up or from others, pick up a bible and seek out who God says he is. In doing so, you will find God. By finding God, you can learn who he is firsthand, and therein put your trust in him. Do not be one of those who will go before Christ in the last days and he will say that he never knew you. He wants to know you and for you to know him. Take that step.

I have a similar problem with Monopoly.

It's impossible for a born again Christian to be demon possessed since believers are permanently indwelt by the Holy Spirit (Rom. 8:9). The only way to overcome demonic influences is to study and apply the Word of God to your life.

Do you know where you are going when you die?

Death leads to heaven or hell, and the only way to get to heaven is to trust in Jesus Christ as your Savior. Jesus loves us so much that He died on the cross to pay the complete price for our sins and came back from the dead (1 Cor. 15:3-4). He promises everlasting life as a free gift to anyone who simply believes in Him for it! No one can be saved by good works. Eternal life is received by grace alone through faith alone in Christ alone (Eph. 2:8-9).

"Verily, verily, I say unto you, He that believeth on me hath everlasting life" (John 6:47).

Nobody has demon inside them, because demons do not exist.

GOD love those who do not assuring partners to GOD , so in saying Jesus is the son of GOD is a form of ascribing partner to HIM and it is the work of satan . So you open the door of your heart to satan and then let it snare and deceive you to be enmity to GOD,the cause you feel that awful way in your life. So come back to believe in the one true GOD, The Lord of all the worlds.

We all subconsciously punish ourselves either here or in Hell severely enough to make sure we don't do that .