I want to have unprotected sex with my boyfriend tonight, I'm not on the pill, we're both clean, he's going to pull out. What is the best way to go about this?

I read that if he ejaculates earlier in the day, followed by urinating after and before sex, his pre cum shouldn't contain sperm. Can anyone help me out please?

My chance percentage of pregnancy is 7% according to <a href="https://play.google.com/store/apps/details?id=com.glow.android.eve">eve</a> so it's pretty low, but I just want some other advice please