My Husband And I Are Trying To Get Pregnant And

My husband and I are trying to get pregnant and a couple of weeks ago I experienced abdominal pain and cramping followed by bleeding. It's was never heavy but brownish at times. It lasted a week and a half then stopped. Yesterday I started cramping again and now I'm bleeding. I thought a couple of weeks ago I was just having my menstral cycle but now I'm not sure. Why am I bleeding again? Is it possible to have menstral cycle's back to back or is something wrong?