Ant issues in my bedroom? HELP PLEASE!!?

This past Easter, my brother dropped a piece of chocolate in the halfway outside my room. My family and I left the house for the day, and when we came back there were about 20 as ants all over that piece of chocolate. Since then, a moderate amount of ants and a few earwigs have made their way into my room. They have no reason to stay, as I vacuum twice a week and eat nor drink anything in here (except for some candy, but that is in a tote bag in my closet and wrappers get thrown away immediately).

I am starting to get really paranoid about this as none of the other rooms have this issue; beyond that, I am afraid that they will start getting onto/into my bed. I can't even lay or sit on my floor anymore because I find about 3 or 4 ants in about a 30 minute time frame-- and my carpet is brownish/red!

Anyway, sorry this was so long, and my question is this: What can I do to rid myself and my room of these ants? I am only thirteen and we rent, so please, no solutions that are too extravagant or costly. Thanks!