I missed a week of bc pills

So somehow I’m the middle of being out of school for break I finished my pack of pills and forgot to start a new pack for an entire week. My pills have three weeks of active pills then I go a week with no pills for my period. I had a lot of unprotected sex honestly because I thought the last week was my placebo week but in reality I missed a whole EXTRA week of pills. I started taking the next pack after that week soooo how high are the chances that I could be pregnant? 😭 I’m already done with the first two weeks of the next pack so I don’t think plan b would do anything at this point. I did take a pregnancy test a couple days ago and it said negative. Could I still be pregnant ?