Can you get pregnant and get your period?

I've had sex on the 19th of November then had the worst period of my life on November 20th (the next day) and my period was normal then we had sex again on December 4 and we think the condom popped so I took plan b one step the day after and today I have my period should I still take the pregnancy test? I would have took it earlier but my calendar was wrong and I had to download this one.