I Am A 54 Year Old Woman With Congenital Muscular

I am a 54 year old woman with congenital muscular dystrophy and in a wheel chair. I am also morbidly obese. I started a water only fast to lose weight and did fine until the end of day two when I began to have a sour taste/feel at the back of my throat. Day 3 this progressively got worse and I have a burning in my chest now as well which is very painful. Will this go away and is it safe to continue the fast?