Can i still have kids? help?

When i was 15 i had an abortion.weeks past i was bleeding not red blood but brown blood i went to my doctor for a follow up he told me i developed a cyst in my uterus he gave me birth control to shrink it while i was there for my examine he noticed i was fully dialed he said something went wrong during the abortion prescribes me medicines....after a couple of wks i go back he said everything looks normal....yrs pass i change docs paps have been coming back normal asked my doc if i can still have kids he says yes well im 31 now ive had unprotected sex with my husband of 6 yrs and i havent gotten pregnant he has a daughter from a past marriage so i know its not him....could it be i cant have kids? Somebody help!!!