Gas pains

Stacey
This morning I was starving and ate a pretty big breakfast really fast(which was a mistake I know.) about 20 minutes later, my upper abdomen started hurting. No cramping. Not sharp. Feels like annoying gas pain. Has been there all day. Has anyone experience gas pain all day during pregnancy? I have IBS so my bowels are naturally sensitive. 
Not bleeding at all and have no cramping at all. Pain is only in upper abdomen and feels like uncomfortable "gas". I listened and found the heartbeat twice today so baby girl seems fine. Just wanted to see if any other mamas have experienced this annoying gas pain!