DS, Pregnancy, and Digestive Issues

I'm 8 year's post surgery, and pregnant with my first child. While I lost a lot of weight, I was super morbidly obese before surgery. After a 50# regain, I went back to the basics, and lost 130# in less than 6 months. Not healthy I know, but it was very easy for me to get back on track once I cut out the carbs. 

I'm now 36+3 weeks pregnant, and I'm having the worse diarrhea ever. I know that it's because the baby is sitting so low, but I'm worried about my baby compromising my already altered digestive system. I am going up 8 times a day, along with the hemorrhoids, I am completely miserable. Will this mess up my digestive system? I don't live near my surgeon, and my OBGYN knows nothing about the DS (she insist that it's the same as RNY). Other than the 3rd trimester digestive issues, I've had a complication free pregnancy, no anemia, no vitamin deficiencies, and although I have gained 35#, I am very confident that I can take it off by breastfeeding, and limiting my carbs. 

How was your post-DS pregnancy? Any severe digestive issues?