There are many reasons that your wisdom tooth in pain. It could be not enough room for it to come out. It could be growing in a wrong direction. It could be an infection.
係咪要等佢出左先唔痛?? NO! Pain is a sign telling you that something is wrong.
會唔會影響其他牙??? It could! For example, infection can spread to other teeth and your entire oral cavity.
I am not a dental professional but I have gone through this process. Good luck.