I had unprotected sex I’m for sure he didn’t *** in me but I’m worried about the pre *** within 72 hours I took plan b . Can I be pregnant?

No birth control is 100% effective. Emergency contraception is generally LESS effective than ... say ... a CONDOM. How IS is that so many women know about PlanB but have NEVER heard of condoms? (Or, perhaps you WANTED to become pregnant when you had sex with NO birth control, but then changed your mind?)

72 hours is rather a long time, Plan B should be regarded as the "morning after" pill (as it is often nicknamed). Certainly within 48 hours of sex. You might just have got away with it being effective after 72 hours. There is nothing more you can now do, except to hope.

Good luck in life.

Pre-ejaculation can get you pregnant (it did with me) however you took plan B within 72 hours it's up to 99% effective in protecting against pregnancy if you took it within the first 24-48 hours its even better just make sure next time you use contraception, you can get it free in the UK, look at your local sexual health clinic or book in to see your nurse / GP for further advice.