Plan b on birth control ?

baby

So my boyfriend and I had an accidental oopsies and we aren’t sure if anything got inside me. I am on birth control and I have been for a year, but I take the POP pill which isn’t as protective against pregnancy as the combo pill. For cautionary measures I took a plan b. Is that alright because I read just now that you shouldn’t mix, but I’m not taking any chances since my pill isn’t 100% effective.