Weird stomach reactions to EVERYTHING!

Hey, I’m just wondering if anyone has or had ever experience loos bowel movements every time they eat and feeling horribly nauseas constantly at 30 weeks... I thought it was abit of a gluten only reaction but I’m starting to react to everything I eat, for 5 days now I’m just getting cold sweats then hot flushes and being desperate for the loo within minutes of eating.

I’m low in iron and have some other health issues going on so now I’m just completely feeling super duper sorry for myself... anyone else had this and have any recommendations...