I Want To Have Sex On My 18th Birthday - Bunmi Sofola

I will be celebrating my 18th birthday soon. I have been going out with my boyfriend for some time now and I am still a virgin. However, I have promised to have sex with him after my 18th birthday and have told him to buy some condoms as I don’t want to be saddled with an unwanted pregnancy. I am still a student and my parents are old-fashioned, so I can’t ask my mum about contraception. My boyfriend said I shouldn’t worry as I couldn’t possibly get pregnant the first time I have sex. Is he right?