To be honest, I can't see anything is your description that should make you worry at all, much less freak out. It seems to me that you're associating a lot of things that have nothing to do with each other. The spots on your lip could hardly be pustules--those don't affect the lip, and wouldn't last a month.
By all means see another dermatologist, or call your former one and ask about potential irritation from whatever was prescribed. But while you wait for more reassurance, I really think you should chill.
Take care.
Dr. Rockoff