Mary, I advise not to second guess yourself. Lots of people who have anxiety issues also suffer from very real and painful medical conditions. The two are not mutually exclusive.
Given your history of GERD, it seems possible that the hoarseness and throat problems could be related. I hope it's just a lingering cold bug, like you said. Check the Internet or the phone book for your local free clinic. I live in L.A., where there are many such clinics -- some of which are quite nice and reputable. The docs there should be able to help you, or even refer you to an ENT specialist who treats free of charge.