Buproprion 150mg question?

i may have bi polar i have mood swings i can get really depressed out of no where i also get energy bursts and then depression bursts i can shift moods 2-3 times in a day but i dont have medical so i cant get Rx i heard this drug doesnt cause weight gain but im wondering my gf has medical and she got it for me 3 month supply of it 150mg i think you take 1 pill per 12 hours and i was wondering if i take this i feel its more likely to help me but whats the worst that could happen should i not need it and need something else? also is this a really high dose? cause ive taken 300mg before and it made me sick / almost a shroom trip, yes i know self diagnosis is not generally a "perfect" idea but i have more good days then bad days but the bad days im impulsive self destruct sabaotage relationships have low energy cant ever sleep at night insomnia and what not and i want a change so basically im asking am i more likely to experience more good affects then negative by taking a chance and trying something ? cause the definition of insanity is doing the same thing over and over but expecting a different outcome also i dont drink everyday maybe fridays how will alcohol play into the effect of the medication ? obviously its probably not ideal i understand but i am who i am and i prolly could be better without it but i enjoy 2-3 beers on a friday night any help or information or personal exp would be appreciated thank you for your time idk if this matters but im a 25/m i also heard this pill can help with energy and activeness and may even help LOSE weight cause i refused to try anti dep pills just cause of the weight gain issue i cant be fat and happy just not gunna happen