What Are The Side Effects Of Depo Provera Injection?

I have been off the depo shot for three months. No ovulation yet and no period. My doctor ran blood tests and my hormone levels are all normal, they say that the levels are in the luteal phase even though I havent ovulated. The problem is that I have the worst symptoms of pregnancy even though im not pregnant. I have very sore breasts, headaches, naseau, exhaustion, and many others. These symptoms are almost severe. Whats causing them?