How can I get my skin to clear up so I can wear less make up?

I'm 19 years old and have never had too bad of a problem with acne- just the occasional pimple here or there. When I was 16, I started wearing TONS of powders and concealers because I was self-conscience about what were then very minor blemishes. Now almost 4 years later, my skin tone has become uneven and even sickly looking, with lots of breakouts, blackheads, and blemishes. I also have perpetual darkness under my eyes and veins and redness on my lids. Ive tried to stop wearing powders and concealers but people literally ask me if I'm ill when I don't wear them. I've tried daily regiments of skin care, drinking more water, or eating healthier, getting more sun, but nothing seems to work. I don't want to be wearing a caked on makeup mask anymore! someone please help me! ANY suggestions?