Using Doxy and Tret, no improvements?

I suddenly developed acne on my chin and forehead area a few months ago. I have always had a few pimples but they were just regular teenage stuff. Now, i'm experiencing acne on my chin, forehead, minorally on my cheeks, around my lips, and sometimes between my eyebrows and on my temples. I was proscribed doxycycline and 0.025% tretinion a month ago, but i've seen no improvements yet. my pores also seem to be getting clogged way easier as the pores on my nose, around my mouth, and on my smile lines are turning into pimples. i'm struggling to know where to go from here? Any advice? thank you!!