Good for you for going! I have had a few derm appts for weird moles and skin issues. As far as what to expect, it is simple. They will have you take off everything (except your underwear) and give you the fabulous paper gown to wear. They will check you over mole by mole. It is actually a lot quicker than I expected. The moles we had questions about they removed. It is very simple. They will inject a little numbing stuff under the mole and take it off. It is usually just a little punch thing that takes it off. Ive had one mole come back precancerous. They cut it off. They called me a little later that week and gave me the results. I had to go back in and they removed more around it to make sure they got everything. That was a little more extensive, it required stitches, but I was in and out. I actually enjoy going to the dermatologist. Just relax--it will be fine.