Another question for y’all

Since I’ve gotten pregnant my stomach is tore up. I can’t eat anything without extreme gas pains and cramping in my belly. Problem is the gas won’t come out. I’ve always had IBS but this is my third pregnancy and I’ve never had this bad of an issue. I started diarrhea before I even found out I was pregnant and it’s getting worse. I hate having a fear of eating because of the pain that’s going to come after. I don’t do dairy, I’ve always had that issue- so I don’t know what else could be causing this. Im 13 weeks if that matters.