Suggest Treatment For Acidity And Indigestion

I have had acid indigestion for three days no matter what I eat! My nerve s throughout my whole body feel like they are standing on end and I keep getting sweaty! I m a 62 yr old, 3-1/2 yr breast cancer survivor. DCIS, no lymph node cancer, radiation was treatment and lumpectomy. Scared cuz I m in Florida visiting son and am from Ohio