Ugh, stomach issues in 3rd trimester are the absolute worst, as if the heartburn wasn't enough! When I had a bad stomach last week, my doctor strictly told me to avoid any home remedies and prescribed a safe electrolyte. Better safe than sorry, contact your doc soon.
Honestly, just stick to basic khichdi and buttermilk once your stomach settles slightly. But first, check with your clinic doctor or go to a nearby government/private hospital for a quick consult. Staying hydrated with ORS is key, but doctor's word is final.
With my twins, double the babies meant double the worry with any stomach bug. Don't waste time trying dadi maa ke nuskhe for food poisoning. Just message your gynac and get safe medicines prescribed so you can rest.
Food poisoning during pregnancy is not something you should treat at home. Dehydration can happen very fast which is risky for the baby. Please call your gynac immediately; they might prescribe safe antibiotics or ORS.
Beta, if you have stomach infection, don't take any random medicine yourself. Drink plenty of warm water and fresh coconut water to stay hydrated. But please call your doctor and let them know, pregnancy is a sensitive time.