weird

Try this on for size.

- I used to have bad acne.
- Because of this, I went on the pill.
- The pill works (contraception-wise) by tricking your body into thinking it's pregnant, hence not releasing ova.
- The pill took away my acne issues.

And yet...

- I am now actually pregnant.
- I now have lots of bad acne.


How can fake-pregnancy decrease acne, while actual-pregnancy increases it? Has logic decided not to exist, or something?