Advice ladies for Indigestion or Abdominal pain

What have you all done for indigestion pain?  I've been to the ER twice in the past 2 months.  Well actually 3 times.  The first, was for "indigestion" it was really painful abdominal pain, I felt like I was going to pass out. Cold sweats, chills, and light headed.  The ER said it was just indigestion and that i should take tums, my ob prescribed me pepcid AC to take every day.  Then the second ER trip was b/c i got bit by my aunt's dog.  Tetanus shot.  Then recently I went back to the ER for abdominal pain.  Had already taken my pepcid AC and Tums.  Drank water, threw up water.  Drank warm water, threw up warm water.  Lower back pain and had to sit at the edge of my bed for it to be less painful.  Usually when I have the indigestion pain it is really painful for about an hour or two then it goes away but this time, it lasted a long time and kept coming and going.  I would feel light headed, and pain was a 9.  I used to think that I am good at handling pain but being pregnant and this type of pain is just... well painful.  I dont know how else to describe.  Anyway, I came home, they checked my appendix, and its ok.  I have gallbladder sludge which they said could have been flared up.  Also, they said it could have been a stomach flu which has been going around. And they said it could have been indigestion.  So, basically not ONE diagonsis b/c they said they can't diagnose me because I cant do CAT scans for certain test b/c of pregnancy.  So, ladies What do you do for Abdominal pain or indigestion?

So Far I have tried:

-tums, pepcid AC, warm water, drink cold water, avoiding chocolate, caffeine, greasy fatty foods. And propping my head up when i sleep.  

Will TRY: 

-sitting up straighter, avoid eating 3 hours before I sleep, are there any stretches or exercises that help promote flatulence? , and ANYThing else would be appreciated.  

And Baby is doing absolutely fine.  She was even sucking her thumb when we were doing the ultrasound.  LOL at least one of us is comfortable.  :)