have been on roaccutane for 3 weeks now, I tablet a day, from by derm, cos apparently i have perorial dermititus, after 2 months on doxy and 3 months on minocyline, and my rash (on each side of my mouth) are getting bigger. should i go back on minocycline. And if so, can i take minocycline straight away after stopping roaccutane.