I have stomach issues (of course I don't have a firm diagnosis)... but I had bad gastroparesis when I was pregnant.. i threw up the ENTIRE 9 months with my daughter.. I would be so excited I made it 8 hours without throwing up and then my last meal (totally undigested- sorry tmi).. would all come back up.. it was awful!
My pregnancy with my son I also had the same issues , though not quite as bad.. and then when this whole thing really got bad, i had major GI issues (malabsorption).. I lost a ton of weight due to this, i was soooo scary thin.. I had a full GI workup - gastritis and esophagitis, otherwise normal.. it was presumed I had celiac.. now If I go too long without IVIG not only do the rest of my symptoms get worse, but so do my GI symptoms (they return)... very odd.. I am gluten free x 2 years now.. it seems to really help