I started off that way similarly. I was so depressed in high school, i would sit outside the class abosutly balling my eyes out day in day out for no particular reason, rarely attending class, many a time sitting in counsellers rooms.
being out of school for only 2 years now all of a sudden i was absoulty hyper tp say the least. I isolated myself to satisfy my energy needs. I would exercise 4-5 hours everyday, 7 days a week, (this includes high intensity, and no bathroom breaks) and still manage to get up at 5.30am in the morning and sometimes struggle to get to sleep around 10 or 11 in the evening.
I was prescibed medication for the "depression" which i did not find effective and didnt take them.
Besides the excessive exercise almost everyone described me as a young kid, endless energy, non stop.
I even won an award at work which was the 'buzzing around the shop as if i was on drugs award'.
I have done every single medical test under the sun, yet my heart seems to race extremly fast at times like im going to have a heart attack, and on the other scale occasionally i feel so down its insane.
ONly about a month ago i went to a psychiatrist once and i was diagnosed with bipolar. I have been taking epilum since then.
I can honestly say the last 3 weeks, i have felt so normal. Yes i may still have that energy, not to the same degree tho, but thats just personality.
The real thing is with all of this, whether i am truly bipolar or not is the question. The meds make me feel fine. and thats all i know.
How long im happy to take the meds for is a diffrent question.
hope that helps