I'm starting to get really fed up with my antibiotic prescription (doxy)

Is it possible antibiotic can make acne worse for some people?

I've been on it for about 12 weeks and have seen no results, if anything its gotten worse (chin, jawline especially)

my skin is starting to get much more oily as the day progresses as well.

I know they are not for everyone but how long should I continue them before giving up hope.

sidenote: meeting with my derm within a week or two..I would just like some advice to help me out mentally..I am struggling