"i was less than pleased to find out that i could use only the depo shot for birth control. i was on it before (about 6 -7 yrs ago) and i gained weight, my hair fell out, etc etc. so this time around right after the first shot i bled (spotted) literally for 3 months straight. every day. also, i was very very moody (irritable) and my sex drive tanked. really bad.  i decided to take the second shot at the last minute and i can&#039;t be happier that i hung in there. i have not bled once since, my moods have stabilized and my sex drive is back! also, i was worried that i would gain weight but believe it or not, i have lost a few lbs."