Suggest Remedy For Unprotected Sex

I have been taking Yasmin for a year now. I was supposed to take my next pack of yasmin last thursday but could not get a prescription until today. I have just taken my first pill of the pack now. How long do i need to have sex with a condom with my boyfriend before i can just use my pill as a contraceptive? Also, we had sex on friday and saturday. He just put it in once and then pulled out. Is there any chance of me being pregnant? thank you