I took a plan b

After I had my period last month, my fiance and I had a situation where I needed a plan b. I had another period right after so I figured it worked. Coming this month I still haven’t had my period so I’ve taken a test and obviously it’s negative, but still no AF. This is my first time taking a plan b, so for any women who are more experienced than I, is this normal? Will I have my normal period this upcoming month?