Stomach issues :( possible IBM?

So for the past week I've had really bad diarrhea, and its so often that usually hardly anything happens because there is nothing left. Along with stomach pains and gassiness, I don't know what's been causing it. I've always had these problems, just never this frequent or pressing. Just before this started I had a night of drinking that I think might have triggered something. Any ideas or help would be amazing! I've been eating lots of yogurt to try to help.