What to do??

Hey y’all so on November 5th me and my boyfriend had unprotected sex while I was on my period. The next day i took a take action pill ( Walgreens brand of Plan B pill). Several days later I had light spotting but I figured it was just from taking that pill. We had protected sex very carefully the next two times. I was predicted to have my period around the first of December, but missed. I still haven’t had my period as of yet . Two of my period tracking apps say I won’t have it until December 22 and my third app says December 25. I have honestly been really stressed just with finals, family and my boyfriend getting deployed in January, also stress about if I’m pregnant or not!! I don’t know what to do?!? Help!