Maybe your sore throat is from the acid coming up. Your stomach is supposed to be acidic. When it's not, your esophagus, which is supposed to be alkaline, becomes acidic. I suggest the Betain HCL.... Start with one with your protein and see how you feel... I take one with every egg or every chicken leg and three with a steak... spread out over the course of my meal.
If you don't need it and/or you take too much you will feel a little burning in your stomach...