"i am so thankful for this birth control. i switched from the pill to depo because the pills gave me horrible anxiety and depression. immediately after i switched, i was myself again. after two doses, my periods stopped. i know birth control affects everyone differently, but i have had no negative side affects at all. my only complaint is after every injection, i would get a headache for a couple of days. i&#039;m 21 and i just hit the two year mark, and my doctor recommended that i switch to a different bc this month and i&#039;m so sad and nervous... i am worried about getting the negative side affects of a new bc after being worry free and comfortable for 2 years."