Hi, I recently got sunburned on my back and discovered a mole that I am pretty sure was not there before, it is small, slightly faded and has a white border like a halo mole, soon after I also discovered a lump on the back of my neck near my spine, it is firm and about the size of a pea. I am a thin man so maybe I can feel it because my neck is thin? I have an appointment next week with a Doctor but I am worried, can you tell me your thoughts?