May I please have your opinion ladies?

I am currently on the pill and during the week of my sugar pills I had a lot of unprotected sex. My doctors office was messing around with my prescription, there was an error between the pharmacy and the doctors office. So when I went for my pills last week they didn’t have them ready. I had to beg the doctors office to give me a prescription and I’m now 4 days late taking my pill. I told them the circumstances. Now I realize I could have gotten the morning after pill. While I’m 30 years old and pregnancy is welcome, it’s not what I want right now. How likely would you say? I never get my period on the pill so I’m wondering if the chances are slim anyways.