What Are The Side Effects Of Depo Provera Injection?

Hello, I am a 22 year old female, and I just came off the Depo shot about 2 1/2 months ago after taking it for about a year and 2 months. I still have not got my period. In 2007 I was put in the hospital for a blood clot that was caused by loestrin 24. Should I be worried about what is going on now?