what should I do?

So I'm not sure about the dates but I took a blank b pill a while ago and I got my period the new week I took another one and the next morning Me and my bf had sex but he came in me but I didn't take a plan b bc I had just took one the day before all I'm for sure is that I'm 10 days late for my period what should I do? Please help I kno we should've used condoms so there's no need to say