I don't think cold feelings and tingling would be from LPR. That sounds more like an anxiety reaction. It could be you are so worried about your LPR that you are paying too much attention to your body. Sometimes when you pay a lot of attention to what your body is feeling, you will notice a lot of alarming sensations that aren't really problems, which then creates more anxiety. I think one of the first rules in treating GERD is to stay calm and try to not let it get to you. Then when you are calm it is easier to look for treatments and lifestyle changes that will make your symptoms less severe.
LPR symptoms would be along the lines of a sore throat, nasal congestion, and coughing.