I wouldn't get too fixated at this point. Of course I can't see what you see, but from the photos it's far from being conclusive .. and in that case I'd always assume the best (even though it may be easier said than done). You have time to see what takes shape and have a good chance to combat it if it turns out not to be benign. If it helps, there are thousands of young guys who have looked in the mirror and asked themselves the same question, only to find they had nothing to worry about (and I know around 15-20 of them personally).