"i started the shot in 8th grade, before high school. i&#039;m now 17, a junior and considering a different method. i was 121 pounds for a few years before i started. now i&#039;m 180 and still climbing. the hormones make me feel hungry all the time. joining a fitness club for a year did not help either. i feel moody often and sad. it did a great job of protecting me and preventing pregnancy. i barely have a period and when it does come, it seems to be off and on for about 2 weeks. for anyone considering this, just be careful of what you eat and make sure your already exercising. don&#039;t listen to your brain telling you that your hungry, listen to your stomach."