Sex advice

So i slept with two guys in one weekend. Well say their names are Harry and Zander. I had Sex with Harry once and sex with zander a couple of times. Harry was a fling and Zander is kind of my boyfriend but not really, it's weird. Anyways, I didnt use a condom with either and didn't realize I was on my fertile window and I'm not on birth control and it's too late to take plan B. I'm freaking out, what do I do. Help please😫