Well, if she's that worried, just take a pregnancy test. It only takes a few minutes to find out.
Though, I really doubt she is pregnant, since she doubled up the pills the next day.
I've only had a false period once in my life and thats because I was first on my period, then took Plan B pills (due to a minor accident in the bedroom) and ended up with another (false) period after taking them.
Evil School!!
May not be on LF as much, due to unforeseen circumstances.
Blame College and Homework for Everything!!
-Fawn