hi there, what you are experiencing is due to lax anal sphincter which is causing fecal incontenence. One of the cause of this is childbirth and surguries. As you have had quite a few surgery that could be the cause for your condition. Some times there is nerve damage
following surgeries which can also cause this. You will need to visit a surgeon who will assess the degree for weakness of anal sphincter and the mode of treatment for the same. In the meanwhile you could try some pelvic muscle strengthening exercises and sphinter tone increasing exercise(Kegel's exercise) to get relief to some extent. Do visit a surgeon and you may see much improvement.Take care.