Acne.....

Okay so I'm having acne problems. I am 20 years old was on alesse for 4 years and I stopped taking it. This started before I stopped taking it though and honestly I've always had perfect skin. The black heads are so deep my skin is always in pain. Im on medication for it right now and it's not seeming to go away.

Why the fuck would this happen?? Anyone had perfect skin and then all of a sudden it ruined?? I'm not joking when I say perfect skin.