Pregnancy and diarrhea 18 weeks

I see my dr tmrw, but has anyone had diarrhea for the majority of their pregnancy? I thought it was all the hormones from <a href="https://glowing.com/glow-fertility-program">IVF</a> so I didn’t worry but it’s still happening at 18 weeks. I’m running for the bathroom everyday 2-3x. I have ulcerative colitis but my flares are different from this. I drink lots of water and take vitamins. Thank you for feedback!!