So I have been accepted to Pitzer College for the following school year and have absolutely no idea what to pack??? What do I need??? What am I allowed to bring?
You can google and there are many lists of what to bring to college. Here is one. Many others easily available online.
http://www.bedbathandbeyond.com/store/registry/campuschecklist/
But also, if you have your roommates figured out, be sure to coordinate who is bring what! Two fridges aren’t going to do you much good. 
I’d wait to buy any major things. Also, it’s a good idea to wait and make purchases for when you get to where you’re going if you aren’t already living in California.