I haven't had the best experience with Dermatologists. All of them seem to want to put me on things like long term antibiotics or the like. None of them ever really seem interested in trying to determine the underlying cause of the acne. Though I suppose if they did that, they wouldn't have too much repeat business :\
I'm not saying that you shouldn't see a Derm. Just be wary, ask lots of questions, don't be afraid to say no to a treatment that doesn't sound right to you (as I did when dermatologists wanted to put me on antibiotics) and don't hesitate to seek another doctor's opinion. Remember, while ideally doctors should be solely interested in their patients' welfare, the fact of the matter is, they're running a business just like any other and are just as concerned with 'the bottom line'.
Is your face oily? Testosterone makes our skin produce more oil, more oil = more clogged pores, more clogged pores = more acne.
Are you getting cystic acne? The kind that is more under the skin, painful and filled with clear liquid?
If yes, to any of those questions, your acne is likely caused by hormones (testosterone).
If that's the case, I strongly suggest talking to your doctor about getting on a Birth Control pill, that is known to help with acne, such as Ortho Tri-Cyclen. It's the only thing that has helped my skin.
I feel your pain, it sucks :\