Hi. So I Am A 15 Year Old Girl And

Hi. So I am a 15 year old girl and have just recently found out I have a bicornuate uterus and I have really bad period cycles. One time in the just the past year I didn't have it for 196 days, then in the month of November I had it heavy for the whole month. The doctors are talking about doing a D & C and looking for cancer should they? Also in the past month I had 5 polyps come out of me and they were tested for cancer but there was none, is there a possibility of it being cancer that they didn't catch?