Sometimes I feel a weird presence in my room, and it really bothers me. It's only sometimes, and most of the time it isn't there, but it happens. I was wondering if there was a sort of spell to get rid of that feeling?
If you are actively practicing magick expect that you will occaisionally experience these kinds of things. Take a look in the spells index here on the site and construct yourself a cleansing and protection spell that you can use to protect yourself. Myself, I would not be too concerned unless negative things start happening. When we use magick, it attracts entities. If you are fortunate, the entity might turn out to be helpful. Take your time and assess the situation before you act on it. Hope this is helpful.
It could be a spirit, or it could just be a lot of energy that's piled up and still sticking around. Casting spells requires a lot of energy, and sometimes it tends to hang around and pile up, so it could be as simple as that.
A simple cleansing spell should do the trick if you really wish to be rid of any lingering negative energy.
If it turns out to be a spirit, you may try a banishing. It's the same sort of concept, and it uses the same energy really, but it might take a bit more energy depending on the spirit, and it is more centered around the idea of pushing it out of your space.
Another thing to consider if it is a spirit could be, as said above, if it is really worth banishing. It may not have any intentions, let alone ill ones. But the space is yours regardless, so it you truly wish it to be gone, proceed. If you are hesitant, maybe just stop and listen to the feeling you get around it. If it really is a bad or uncomfortable feeling, I would go ahead with the banishing. But if it is just sort of an indicator of its presence that you are not quite used to, I might reconsider, maybe wait and see what happens.
Some smudging and protection and cleansing spells in your room and on your person would definitely help. Also, make sure you are casting in a circle so your magick is bound and is your own. I dont like to let my magickal energy float around freely so to speak.