Bad spirits and energy in my house help!?

It's no coincidence that bad spirits only turn up in the wee hours and hang around in bedrooms. Because if they get seen they hope the people will just brush it off as a waking dream, grogginess or something similar.

<my girlfriend woke up in the middle of the night> ...and saw a hypnagogic hallucination. https://en.wikipedia.org/wiki/Hypnagogia Not that unusual, and not paranormal. Hypnagogic is the reason the vast number of genuine 'ghost sightings' happens at night and in the bedroom, because they are related to sleep and dreams, and aren't paranormal at all.
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<[I] thought [I] saw a black shadow myself but it could be [I] was just tired> Any time you're faced with that choice, the natural explanation always is the correct one.
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<We have smudged the room before we moved in> In other words, you, or likelier your girlfriend, already harbored superstitious beliefs before you even lived here. Is it any wonder she's afraid of shadows in the night? Or that she jumps to the conclusion that anything she sees must be paranormal? That's what she *wants* to see and believe. The only 'bad energy' in the house is your own superstitious fears. Are you going to let yourself be led by those, or are you going to let your life be guided by reason and rationality? There are virtually always plausible, rational explanations for everything we experience, if we'll only look for them, and even the least plausible natural explanation is always exponentially more likely than a supernatural one.
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" i thought i saw a black shadow myself but it could be i was just tired" This seems more likely, yes? There are reasons why ghosts and hauntings are reported more at night than any other time. One big reason is that your brain is groggy when you just wake up and you are prone to visual hallucinations, or you may only be half-awake and still dreaming.

The best help I can give you is encourage you to look for the likely explanations instead of the outlandish ones.

How long ago did you move in? Shadows don't normally bode well in any occult magick grimoires, but sightings usually have very plausible explanations nine times out of ten. If you really think there's something there or a problem is arising, burn some sage and line your windows/doors with exorcised salt (rock salt, words below). If a clear cut and genuine problem is coming up, you should contact me.

Domine, creatúra Dei Exorcizo te per Deum vivum, per Deum verum, per Deum sanctum, per Deum qui te aquae infundi Eliseus propheta qui est in potestate vivificantem restituit. Ut efficiaris sal exorcizatum in salutem credentium: et sis omnibus sumentibus salus mentis et corporis usus es , ut arida et in fugam conversi sunt locis sprinkled deturbare et speciem iniuriae et vicissim diabolicae fraudis , omnisque spiritus immundus, adjuratus per eum qui venturus est judicare vivos et mortuos, et saeculum per ignem. Amen.

- Roman Book of Rituals

If something was going to harm you, sheets and blankets won't stop it. But that being said, I don't think anything was trying to harm you. Google how to bless a house and bless a room. There are many different ways of doing it. Even if you think it might just be from being tired, it can't hurt. Better safe than sorry, especially since it's so easy to do.

if you find the answer post it I had the same "dream" it was terrifying

Their presence is not necessarily bad. They didn't bother you.

Smudging is a practice of the occult. That invites demons in.
Evil spirits do exist. In one essay a promoter of witchcraft warns: “The Shadows are out there: They exist, in the invisible world that parallels our own, living creatures. . . . The terms ‘Imp’, ‘Evil Spirit’ and ‘Demon’ are fairly accurate. They are very strong. . . . The most intelligent variety . . . are capable (if someone is helpful enough to open a doorway for them) of entering our world."