My last period is nov.5 then we make love with my boyfriend nov.9 but we make it only once till now till now my period didn't came I'm so worried I need to take my medical exam nxtweek could you help to resolve this situation because I'm not yet ready to have a baby 4 now?

Of course you can be pregnant - you had sex! 'Just once' is not meaningful. Buy a urine test kit in a drugstore, and even if negative, take another some days later, and so on. And discuss pregnancy with your doctor, or look into alternatives.

ANY time you have penile insertion there is the risk of pregnancy. No form of birth control is 100%. If you aren't ready for a baby then you should not be engaging in sexual intercourse.

You will have to wait until a week or two past your due date for your next period to take a test.