Struggling with IBS and Thanksgiving

It's Thanksgiving today. for breakfast I had one Greek yogurt and 3 Oreos. for lunch I had a full plate of Thanksgiving fixings. my stomach started to feel bad towards the end of the plate, and then when I got up to throw my plate away my stomach started to hurt. I went to the toilet and thought I would throw up bc no poop was coming out but my stomach hurt so bad. finally some rabbit pellets came, and now it's all liquid diarrhea. I hate myself for not getting my IBS under control. I've been skating by, switching between constipation and diarrhea every few days, going poo multiple times in a day, but now my IBS is getting in the way of my life but I still struggle to fix my diet. I know that carbs trigger it bc last year I turned my diet around, cutting carbs to a bare minimum, and my IBS stopped bothering me for months. but then last spring I got lazy and started bringing more carbs to work for lunch, then summer came and it all went out the window. now I'm suffering the consequences but still don't feel real motivation to fix it. what is wrong with my mind????