I am not saying this from experience, but I have a friend who recently (in the last 6 weeks) went to the ER because of left sided numbness, pain and pain in her chest; she thought she was having a heart attach; they did all the tests and xrays and it was diagnosed as GERD. She was put on Protoniks and is feeling much better; but don't take these symptoms lightly. Always get checked out by your doctor or at the ER. As a side note, when I started having problems with the acid reflux, both of my calves became tight, with cramps. I just assumed it was because I wasn't eating well.