Tuesday I went to my doctor and decided I would take another form of the pill she said wait four days then take the new stuff. I stopped taking old pills on Wednesday, I had sex Saturday morning and my partner pulled out. I did not have a period the following days yet had some cramps and period diarrhea as I would usually get. I have been on the pill for three years now. I am supposed to skip placebo weeks so I never have a period. I do not know when I'm supposed to have a period. I am concerned about pregnancy and wondering if I should take plan b. Monday would be my last day to take it. (Side note: I started my new pack today, Sunday)