My body hates me right now (TMI)

My body is going through it right now. Yesterday I ate some mac and cheese that I have never had issues with before, and my lactose intolerance kicked in and gave me an awful stomach ache and the poops. I ended up having to miss class because of it. After and hour or 2 i was better and was even able to eat some toast because i was STARVING afterwards. Fast forward to today. All day im fine, taking it easy and being careful with what i eat. I ended up eating chicken cordon bleu, cole slaw, and potato chips for dinner. About 15-20 minutes later (at this point i have somewhere i need to be) my stomach decides it wants to rumble and grumble and expel everything out. So i use the bathroom twice, with the 2nd time being as close to diarrhea as one can be without actually being so. I ended up having to skip the thing i needed to be at because my body just doesnt want to leave. I also am dealing with a fluxuating body temp of 98.8 - 99.2.On top of all this, I'm close to my period and having diarrhea and being sick is my biggest anxiety trigger. So here i am trying to not freak out over this natural bodily function, while also feeling shitty and guilty about missing things because of it. I have come really far with my anxiety and handling this, but the past two days have really tested me. Im so sick and tired of my stomach.