I have a laundry list of health issues including IBS, reflux, anxiety, anemia, and all things that can cause chest tightness. But this feels much different. It started last night, my stomach muscles felt tight (not a stomach ache for once) just super tight like i did 1000 sit ups. But i did not. Then later I took a short car ride and when I was sitting up it felt like my chest was closing up and getting tight, almost like I was going to choke. The only think I can think of is I have some form of a stomach bug like whats been going around my school? But I really dont have a stomach ache, I ate this morning and am fine, i just feel like I ran a marathon and cant catch my breath from walking around my kitchen. Does anyone else get this? Could it be my reflux or IBS or something? I get tight stomach muscles sometimes but this is weird and different.