Plan B after LH Surge?

Okay y’all I’m in a weird situation. I’m married and a mom already but got cold feet about trying for #2.

I had unprotected sex 2x, the next day I got a positive OPK (a strong surge) as well as the pinching feeling I get when I ovulate. About 12 hours after I got the positive, I took a Plan B. I started to feel really guilty about it so I made myself throw up a few minutes later but did not see the pill in my vomit, just cupcake lol.

Please help