Well i clearly remember one hypomanic episode you had where you didn't sleep for 36 hours because you felt you didn't need it... that was back when i first started coming to the forums. so it's possible you do have it.

that being said, if you feel good without meds, then i wouldn't even worry about it right now. bipolar is just a label and that label does not define who you are. so if you feel good now, i would concentrate on that, and not worry about whether you fit the diagnosis or not. just watch for signs of hypomania such as not sleeping for long periods of time, because that could be dangerous. good luck to you! I hope school has started well for you.

(i also think bipolar is the new borderline and it is way overdiagnosed, but that's my own personal opinion).