"i am 19 years old. i have been on the depo since i was 16. i got on it after my 6 week check up. when i first started on the depo shot i was a very mean person. i have never in my life been like that. i am a very nice laid back person. i gained 40lbs withing the first 3 months. i am not a big eater and i do eat healthy for the most part. i also had pregnancy like symptoms, headaches and bloating. after a year of being on the depo my mood had changed and i became back to myself and my body got used to it. i really really love the depo shot but i am thinking of switching to another method. i love how i haven&#039;t had a period in 3 years and it is 100% effective but i cannot deal with it making my weight go up and down. overall minus few things i love it."