Could I have some insight on the side effects you guys get from the depo shot?? I've had 2 shots so far, the first few months were fine, until about a week ago I had PROTECTED sex, and now I'm feeling a bunch of side effects. There's no way I could be pregnant, we were as safe as we could have been. I'm getting cramps occasionally, back pain, joint pain, tender breasts, headaches and sometimes ill feel a little queasy. Any advice?