It could be from the microgynon... but what I would do is wait for another month or two and see if it clears up.

It can take your body up to three months to adjust to the hormones in the pills, during which time you might experience some side effects. For most women, any side effects will go away after this time.

So even though it may suck, I'd suggest sticking with it and seeing if it clears up. If you are still getting acne after being on it for a few more months, than you can get off it and find something else.