I completed a course of roaccutane about 2 and a half years ago. I'm currently in the process of getting scar treatment

Starting this month I've noticed that I get a huge pimple almost 2 weeks before my cycle starts and this pimple is huge with pus inside very painful.it started with one now I've had 3 all same sizes and more painful than the first the pic shows the popped pimple but it's still there and a little less painful.i do not want to continue roccutaine again but over the counter Antibiotics with retin a are of no effect.please advise what should I do?ive put scar treatment on hold due to breakouts!

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