HI...I would have to agree sounds like IBS< but, more important have u been to a GI dr to find out ur true root issues?
If u have a hiatal hernia the IBS, bloating and heart palps make sense.....so do see ur dr.U will also want to look at the Health Pages here on MedHelp.
http://www.medhelp.org/health_pages/list?cid=236
"selma"
I can't say for sure if you have IBS symptoms. Are your having diahrrea? The bloating is probably gas, which is causing the pressure in your chest, or maybe heartburn or both. Activated charcoal capsules from the health food store can help with the pressure/bloated feeling from the gas, as well as with loose stools. Take them 2 hrs before or after meds or vitamins. You feel better after you poop because all that pressure is finally being released.