I had my surgery to comfirm Endo two months ago... I have two daughters 5 and 3 ... Made them naturally.. Been TTC for almost two years... My endo had grown to moderate so my doc was able to remove all of it... This month Im on two diff fertility shots and pill.. My Doc told me that Endo cant "harm" a pregnancy and usually helps symptoms. When I was pregnant with my daughters I didnt feel as bad as when Im not pregnant if that makes sence...
Diarrhea can be a pregnancy symptom.. I'd check with your doc just to be sure...
Hope my rambleing was helpfull!