Started a new bcp month before last. taken at a fairly specific time each night. day 4 of placebo pill and no period. should i be worried? i have had

BCP ?'s: As long as you are fairly punctual, the bcp's are almost 98% protective against pregnancy. The only time they are ineffective is if you did not start your current pack the day after the placebos are ended. Think back to last month and determine whether you were late starting this pack. Ovulation can occur, and pregnancy would be possible.