I stopped getting my depo shot about a week ago. I had unprotected sex a week ago, now I have weird headaches, back pain, cramps, bloating, stomach pains in my upper and lower stomach. I had been on depo for a year. Could these symptoms be caused by my stopping depo, or could I be pregnant?
I assume when you say that you stopped getting the shots a week ago, that you mean that you were due to get your three-month shot and didn't get it.  If that is the case, then it is not uncommon to have some hormonal symptoms like you describe, as your body starts to get back to normal natural cycles.  Although it is possible that you are pregnant, is in unlikely that you got pregnant so soon after stopping the shots.  It might be a good idea to check a pregnancy test just to make sure, but I doubt that you are pregnant.  These symptoms should get better over the next few weeks.  If they persist, you can see your doctor to make sure nothing else is going on.  I hope this helps, please let me know if you have any more questions.