it sounded to me like cystic acne till you mentioned they seem
to fluctuate in size. As far as I know, cystic
acne don;t fluctuate in size. Can you ask
your doctor to name them exactly? did u not go for a follow up where he records any improvement, etc.?usually cystic acne are dark and round and can appear anywhere, esp face, arms, shoulders, chest etc. the contraceptive pills should have taken care of them though.
let us know here if you get any more info.