I have had moles on my back for my whole life, but suddenly, today, one of them is itchy and swollen. As the day has progressed, it has become even more swollen. I have a dermatologist appointment in a week, but I'm concerned that I might need to seek treatment sooner. The entire area around the mole is now hard, and the mole itself feels like a fluid filled blister. Is a week too long to wait to get this looked at?