Should i get a plan b?

My boyfriend and I had sex and the condom broke. He didn't cum though. He said he felt the condom break so we pulled out and the top broke. My ovulation window starts tomorrow according to the app. I went to go quickly pee just in case lol it probably didnt even do anything but yea. Should i get a plan b or no? Im just worried because precum and my window starts tomorrow 😩😩