Belching Irregular heart beats

In the past 6 months I have developed belching, either after I eat or if I don't eat on time. I can live with this. But it causes me to get a little half cough, and makes my heart skip beats and beat irregular. When I belch it seems to let up, but then builds up again. It is un-nerving. I went to the ER and spent a small forune on tests to find out nothing seemed wrong. Sometimes I take anti acids and it helps. But this will go on for a week or two then I may have a week or 2 I have no problem. Where to go from here?