Missing pills for 2 days during ovulation - new pack

Hi guys! I’ve recently changed pill brand from Yasmin to Microgynon about a month ago. After breaking up with my Boyfriend I decided to stop taking the pill as I wasn’t having unprotected sex anymore, but I was bleeding non stop for a month and that’s when my doctor switched me to microgynon. This is my 2nd pack but I had forgotten to take 2 days of pills when I hooked up with a Friend. Unfortunately, we were drunk and realised the condom slipped and the deed was done during my ovulation period. I’ve been travelling and haven’t had the time to get plan b, so what are the odds of a pregnancy?? FYI I’ve been on Yasmin for 5 years before the break. Thanks !!