I am an extremely unhealthy 48 year old & I had a hysterectomy (by choice not because of any medical problem) at 43 I haven't done any real exercise since age 10 (due to health issues) exceot I did walk abit until about 15 years ago!! I am very overeweight & was when I had the hysterectomy yet I have had absolutely no post-operative problems so far as that aspect of my body/health is concerned nor any new medical problems.
Personally I think you should get yourself thoroughly checked (including at least a laparoscopy - that's what it is called here, they make two tiny incisions, below your navel & at the top of your pubic hair then insert a camera & check out all your internal organs & areas & they can often fix any problem at the same time (depending on the problem of course). To me it sounds like your dr may have sewn you up wrongly, not done a proper/complete job, or left something behind or maybe you have an infection?? But in any case get a new dr & new gyno & keep searching till someone finds the answer because i'm sure there is one & I would be stunned if you don't find some sort of mistake in the original surgery.
Good luck