I agree with Robert. Mania/hypomania is a heck of a lot more than feeling okay after one night of missed sleep and getting drunk for the first time then sleeping it off.

Depression and anxiety disorders definitely can cause swings in your emotions like what your describing. So can letting yourself go because you're too focused on school.

You describe a lot of symptoms but, you're not describing experiences that I can relate to "bipolar".

Good luck.