Definitely go back to your GP. Took a good year for me to find the right treatment. Drs often recommend the pill alongside the antibiotic but the hormones actually made my skin worse. It began to clear up once I stopped all contraception.
I had acne from the age of 18 up until now combined with Rosacea.
The best thing I did was invest in decent quality skincare and develop a good routine. I can't use high street skincare that claim they help with acne as they all contain Salicylic Acid which burns my skin. I can't use cotton wool or face wipes either.
Best thing I ever did was see a beautician who talked me through my skin type, described the problem and how to overcome it.
I was unable to exfoliate my skin for a good 12 months and at points, my whole face felt and looked like I had a year long sunburn.
Once I'd switched the skincare products, I can now exfoliate and my skin is now looking pretty good!
My skin responds well to Dermalogica Ultra Calming. I use the cleanser, active moist moisturiser, barrier repair and the Microfoliant face scrub. I cleanse twice a day, moisturise every morning and use organic rosehip oil every night. I use the barrier repair in winter in place of the moisturiser. I use the scrub once a week.
I'd absolutely avoid anything clay based as well. People turn to it as it removes oil associated with acne, however it dries the skin out, makes it painful and is generally too harsh for acne skin. I have very oily skin but even that is under control now.
Dermalogica is quite pricey. The large pump tube is about £50/£60 but I got mine in January and I'm only down to the last 3cm of the tube now. A 5p size blob does your whole face, you wet it, massage it in then rinse off. Using Luke warm water means the heat from hot isn't aggregating the acne.
I also now (and it's fecking hard) have as many makeup free days as possible to allow my skin to breathe.
I really hope you get it sorted, I know how soul destroying it can be.