Feeling really weak- anxious??

I feel so anxious right now. I'm away visiting my school (I'm starting college next year) for orientation and right now I'm at a hotel with my parents. I feel really tired and worn out, I felt like this yesterday too and have felt like this on and off since prom. Prom and graduation both stressed me out to a ridiculous level (I graduated two days ago, prom was mid June). I feel so tense and anxious and like I have to escape but I have no idea where to. I also feel like I need to go home but I normally love being in my college town and by the beach. I don't know why I'm feeling anxious to be away from home. Help??