Missed two periods since april... what's wrong with me?

Not ovulating? I: If you're not pregnant, then you haven't ovulated since April, since ovulation is what brings on a period 2 weeks later. If you wish to become pregnant, see your doctor. Otherwise, you could wait and see if your period starts again.

Skipped cycles: First, if sexually active check a pregnancy test. otherwise it could be that you didn't ovulate (common in teens). Hypothyroidism is another cause. Time to see your physician.