Went a long time getting great shaves and all of a sudden I have a trouble spot on my neck , now it's both sides. First time it was with almost any safety, this time started with a minor one with a g plate Karve , then even an f plate now a c plate. I used to shave once a week , switched to 3 times a week and backed it to 2 times a week. Any thoughts? Going to go a week and then shave again.