Welcome, Methadone! (First question: Are you a Breaking Bad fan?) lolCongratulations on being free from the hair issues and chemicals. Now, it seems that you are faced with the peanut gallery. Funny thing is, they were the ones you may have been trying to avoid all this time by covering up the balding. They just don't go away. The good thing is you can just tell them that you shaved your head because you like the look. Why did each of them chose their hair styles?..... they liked the look. So it is believable--especially if you really do like the look. Just be confident, don't waiver or give them any reason to doubt you. Own the look and be proud. If you feel it, they will see it. They won't need to ask you again.
"Because I wanted to. How about them Red Sox?"Congrats on achieving your freedom.