Yes, some of it could be GERD. You need to be seen by gastro, as well as other Drs. (possibly)
I used to have tingling in my arms as well. I went to a chiropractor and with his "adjustments" it cleared up. As far as the ridges on your tongue, I would ask my physician about the possibility of some sort of viatamin deficiency. (maybe malabsorption.) Always start with a medical Dr. !!!