Hello i had gone through your question and i can understand your concern this could be due to any of following impending menses or premenstrual symptoms missed abortion PID or STI acid peptic disease i would suggest you certain investigation like blood for hemoglobin CBC liver function test urine pregnancy test urine culture or an ultrasound if nothing comes conclusive after these tests and clinical examination upper GI endoscopy is recommended have plenty of fluids maintenance of good hygiene multivitamins supplements avoid fatty fried spicy and junk food or carbonated drinks Hope this helps you best wishes