Hi Minni.
I had my normal withdrawel bleed within 4 days, and i had my first natural period after 33 days.
Don't stress, ive heard so many horror stories about going off BC, and i didn't really get any side affects. My cycles are a little long (around 35 days now) but i think that's just me.
Do you remember what your cycles were like before BC? Unless you have another condition it should go back to normal fairly soon =)