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?
Perotin, not due to what you are describing here. The pill will suppress your cycle to such an extent that you will not ovulate in the 'placeb'o week. So sex during your period (or the few days before or after) is perfectly fine and safe.
Of course the pill is not 100% effective but it comes pretty close.
Generic and original medicines have exactly the same active ingredients. That is why they get licensed to sell it without going through extensive testing. The testing on the original is considered enough for it and all the generic copies.