Firstly welcome to our forum
I'm sorry that I can't tell you what these spots are. The fact that you're seeing a derm soon is good, they should be able to give you at least an idea what they are, and after a few tests tell you for sure. Most family doctors do not have the same training in skin conditions, that is usually why you will get referred to a derm. There are so many different kinds of skin conditions, some of which show similar symptoms, that is why it is so difficult to tell which one you have.
Try to moisturise as much as possible, to limit the damage caused. An un-perfumed moisturiser is the best sort to use, and using it straight after a shower is also a good idea.
Sorry I can't be of more help, but please keep us informed as to how you're doing. We are a bit of a crazy bunch round here, but we do try to give each other as much support as we can.
Looking forward to getting to know you better, through your posts.