May want to check on a Mallory-Weiss tear. It happened to me once and scared the heck out of me. You tear the lining between your stomach and esophagus. Then throw up bright red blood.
Maybe too acidic. Need to alkalize.
The day it happened to me I had barely any food that day except OJ, Vitamin C, chips, salsa, and a margarita.
That was like 15 years ago before I knew any of this.