chances of getting pregnant

No rude comments please

Long story short

I plan on having sex with someone tomorrow ( Tuesday ) and before he told me he’ll provide the condom . Yesterday I asked him if he has a condom for tomorrow , he said no . So I said we are using a condom and this dude wanna say no , that I should get a plan b . So I asked why he doesn’t want to use a condom he said bc it feels ugly .

I brought the plan b and he’s going to use the pull out method . But I’m still gonna insist we use a condom . Bc ik for some people the pull out method works but not for others ...

Before I forget , we both are over 18 .

How high are my chances of getting pregnant?

and if I take the plan b after we have sex, do those chances go lower ?