I've been on Diane 35 for at least 6 months. A few weeks ago, I had unprotected sex. That was the night I took the last pill in the packet, the 21st pill. (Diane 35 doesn't have placebo pills). Of course, I resumed taking the pill 7 days later, only this time I switched to CyEstra 35, the generic version of Diane 35. I did get my period, but it was a couple days earlier than I expected. Is there a chance I could be pregnant?