I'm nearly 10 weeks pregnant with twins and I've had diarrhea on and off since my BFP. The GP tested me for infections and all came back negative, so it seems to be just hormones making my IBS worse. I've not put on any weight, in fact I'm still a couple of pounds short of my pre pregnancy weight, despite eating loads. I just wondered if anyone has experienced anything similar, did you find anything that helped and were you able to gain weight in the second trimester?