I just turned 18 years old and was prescribed Doxycycline Hyclate...

I just turned 18 years old and was prescribed Doxycycline Hyclate 100mg, BenzaClin (Benzoyl peroxide), and Differin 0.3%. I've been on benzaclin and differin for about 3 years now. About 2 months ago I was prescribed doxycycline for my acne. I specifically told my dermatologist that I wanted a higher dosage of acne medication since the minocycline 5mg wasn't strong enough for me; I had taken it 2 years prior to my visit. But when I would take doxycycline I'd feel a litte bit of nausea coming my way so I decided to drink some water with it. Shortly after I'd get something to eat. I'd feel better soon after. I've been on this medication for almost a month now and I'm not feeling any adverse side effects. My acne has somewhat cleared up but then i breakout again, around the same area. I'm hoping my acne will clear by the time I go for my check up in feb but if it doesn't, i want to be prescribed accutane instead. Also, stop the medication if you're having horrible side effects, obviously there's something wrong. It could also be an allergic reaction, I'm just fine but then again, I'm not allergic to anything and I also avoid a lot of sun exposure.