Suggest Treatment For Cystic Acne

So, I am 27 and have always had cystic acne. In the recent months/past year it has become manageable (a few on my chin that resolve in about a week), except for this past month. My face has blown up with pimples!! Painful ones at that. I've been going insane trying to find the culprit: same laundry detergent, sleeping with my hair pulled back, same hair products being used, same medicine being taken, same diet (with the exception of more cookies and sweets around the holiday).

Please help me figure this out!