I’m panicking a lot at the moment

My period has been super off for the past 4 months, at one point I had protected sex on October 4th took a plan b bc I was scared something was off, got a period a week after on the 11th. Then I completely missed my period for November and then got it on December 23rd and it lasted till the 28th. Now January came around and I have protected sex the 20th and did not get my period. I then had protected sex again exactly a week later and took another plan b bc we saw cum (long story) it’s been exactly a week since I’ve taken the pill and I’m scared cause there’s no period, no symptoms nothing. Please someone help me, I don’t want to be pregnant and I have so many questions but no one to ask.