ok so i have an actual question if anyone can help me out

so i havent always been like this but for the past few months whenever i eat i end up feelin sick afterwords

no matter what it is i eat, i feel sick, and this comes every once in a while and i have control over it

and then theres this thing thats started where, if i go to a restaurant, i have to be seated with my back against a wall because i just cannot have people behind me. i get so uncomfortable and nervous and paranoid and wow its just not fun

well, tonight was probably the worst

i went to chilis with my mom and i was seated alright, no one behind me except for the kitchen

i started to eat my food, but like two nachos in i started feeling really really sick and i couldnt eat. ive barely eaten all day because i was waiting for dinner (which i normally do and its normally ok) but this just

i couldnt eat and i couldnt calm down

i just want to know what people thing about it? so my question is, do you have any idea what the hell is going on with my body..?