Hi, I am a 55 year old female, about 35 lbs over weight...I never used to burp...now I burp all day long...when I do have acid come up my throat at night, it feels like my stomach is completely full of it ...that doesn t happen all the time. My stool is now turning black....my stomach is tender to the touch...I feel tired a lot....my joints ache most of the time.....I have to unrinate way to much...IF I don t drink enough water...when I urinate , I get this shock that travels all the way to the end of my left thumb ( I know,that sounds silly, but it happens ALOT, especially if I have been on my feet all day and hardly drink water.