Hi i have been on depo-provera for about 4 years and been off for 6 months and got my period back, what are my chances of getting pregnant?

Depends on your age.: Your fertility should return soon after stopping the depo-provera injections. Your likelihood of pregnancy depends on your age mostly (see attached graph), as well as on your past gynecological history (fibroids, salpingitis/pid don't help). Take Folic Acid 1-5 mg daily, avoid smoking, maintain a healthy weight for your height - and good luck!