I've been on the depo shot, but its supposed to stay in your system for three months but I think its been longer than three months since I last got one and I haven't had a period. I had unprotected sex 6 weeks ago but he pulled out. I haven't felt very good lately. I've been having stomach cramps and my right breast is sore especially if I apply pressure. I get really dizzy and feel like I'm going to puke sometimes. I've also been tired a lot lately.. and I'm hungry like all the time. I think I've put on a couple pounds but does it sound like I could be pregnant or could it be something else

Probably so but since its been at least 6 weeks, a urine test will show up!