Skipped period with pill and now no period?

i started yasmin pill 3 months ago when i had my 1st period after having a baby and last month which was my 2nd month on pill when i finished the 21 pills i started another packet straight after to skip my period as i had to be a bridesmaid that week. The pill finished last wednesday and i havent got my period yet.whats the problem? i couldnt be pregnant coz i was always on pill and he always used withdrawal method