Plan B

Okay so about a month ago (the 26th of January) me and my ex (was my boyfriend at the time) had sex first we used a condom and then we did it without a condom I took Plan B 2 days after but its been over a month since I got my period (my last period was on the 7th) I've been going online and reading that sometimes some women experience a delay in their period when you take Plan B because of all the hormones but is it possible that I may be pregnant, someone please I need help and advice please!