I had an abortion on March this year, then i have been on nuristerate since. In August when I was supposed to get my third injection I defaulted and never went back since. Last week Tuesday I decided to go and had been on my periods for almost a month. The periods were light i was using panty liners. The problem is a day after i took the injection I started having unbearable pain in my womb. We did the pregnancy test with the doctor and it was negative. Now i feel so sick what could the problem be, i am still in pain