Hello whyme, welcome to PS! I'm happy to see that you found the post by stix2702 in another forum. As you can see, you're not alone. In the post, I shared my experience with some of the same symptoms that you both describe.
Don't be too hard on yourself. Heck, as anxiety survivors, most of us have the need to know what could be wrong with us, hence, we seek the answers by surfing the net. I'm pretty sure that's how you found us and THAT'S a good thing
Try not to be afraid . . . symptoms of anxiety can mimic many more serious conditions. So, best to stay away from medical websites until you can be properly diagnosed. And even then, get info needed from your own physician. He/she will know the degree of your condition best.
I know how hard the waiting can be, but please try to relax until your appt. Try some deep breathing exercises and relaxation techniques. We're here, so come and read, post and blog. Try blogging about your experience. It can ease your anxiety and there are many here that can help you through this . . . hugs