Curious?

I took a shot on March 9 for birth control. It called depo shot. So, I was 34 days late on it. I went to doctor to see check if I am pregnant or not. But! I am not pregnant. I went to get shot. So, since that, I feeling weird, attitude change, pee a lot after sex, headaches, and eat so much if I am not hungry. I had sex every weekend. I am tired sometimes. My back is hurt sometimes. My belly look big because depo gain the weight. I don’t know what to do. Do I need to take pregnant test? But it will be negative! Help!