What Causes Bleeding After Bladder Repair Surgery?

I had an operation four years ago to repair bladder. A peermanent suture was made way up inside and now, my body is rejecting it. \it causes me to bleed and this has been going on for about six months now. I have seen five doctors two were in an emergency hospital, two were medical practitioner and one was a specialist in the field. The Hsp doctors told me it was the suture trying to come out that my body was rejecting it. Two others. tried to remove it but because it was causing too much bleeding, they stoped. The gynecologist who put it ther said , it s okay . But it is not okay \i am 73 years old and bleeding is not a normal thing . \i am afraid it could cause infection or worse. Lastly, the bleeding is not that much, but it does require that I use a pad. Please advise me because I cannot find any help here at the present time Monica