Feb 2012 I got the Depo Shot. I went the US Army Basic Training. It helped me not have a period, and to gain weight. I did not gain a single pound, and I still am under a hundred pounds. I will be 21 in a month. Continued to get the shot until Nov 2012. Got a period for two weeks in Dec 2012. It's now the end of Jan 2013 and I have not had a period. I was sexually active and not careful. I do have tender breasts, cramping, and a face full of acne.. Could I be pregnant?