I'm not a doctor but, I'd question why your doc hasn't come up with a possible solution for this problem. Perhaps, getting a second opinion may help? Fibroids generally shrink after menopause so, if you have one that is of size enough to be able to cause bleeding like that after 32 months and put pressure on bowel and bladder and causing you this much discomfort, I'd say that a second opinion would be warranted here as to how to get help for this. I think that perhaps, a uterine biopsy (simple office procedure, done quickly and easily) might be called for here just to be on the safe side. It could be that you are prolapesed (lowering of the uterus into the vaginal canal) which might not allow for full emptying of the bowel/bladder or both. Perhaps, trying some fibre supplements might help with the bowels emptying more readily?
In all honesty, I'd seek out a second opinion as to what can be done to help you because you shouldn't have to put up with this type of constant discomfort and there should be options given to you...not just an "it's likely a fibroid" and nothing else offered.
Best of wishes.