Plan b

So, my period was October 2nd to the 6th being the 6th just spotting. I took my birthcontrol pills very steady the following week but I missed my pills the 12th and 13th. I ended up having unprotected sex on the 13th, the guy didn’t cum in me we used the withdrawal method and within two hours I took my plan b pill then 5 hrs later I took my normal birthcontrol to get back on track. Could I possibly become pregnant. I am very worried and I don’t want to worry until my next period.