Hi, I was taking Diane and on the 2nd day of the placebo week, me and my partner had intercourse (Friday, around 10pm of June 18th), the following day around 1pm (Saturday) I took 4 Nordette pills and another 4 on Sunday. I didn t experience any withdrawal bleeding for the entire week that followed making me anxious that I drank another 4 of Nordette on Friday, June 25th. Then came Sunday (June 27) I had blood in my vagina but never flowed down. There was none on June 28, then it came back on June 29. Is it possible to be withdrawal bleeding or an implantation bleed? Please help.