Any tips?

So I'm like half a virgin. I've had my cherry popped, gave & received oral. My bf doesn't want to pressure me at all about sex like he's very understanding & sweet about it but he does want to give me oral. I'm not sure if it's going to escalate to sex but we would use protection. I'm not a birth control and in 3 days, my period will be over. So any tips on how to stay protected if we were to have sex?