Which contraceptive??!

So, I’m in a tricky situation rn. I’m gonna have sex this week, but I don’t take the contraceptive pill and I’m thinking of ordering one, however it’s bank holiday Monday so I won’t be able to get it till Tuesday. And even so, I’m past my fertile window so I’ll still have to use a condom anyway. Or I could just use the condom, but to be extra safe, go to a clinic to get the morning after pill. Idk which route to take.