No you cannot get pregnant this way, dont worry
No you will not get pregnant unless his sperm went as far to reach one of your eggs. You said it was simple penetration so unless it was something more you have nothing to worry about.
Thanks for the comments. I had been worried for many days until i cant sleep at night. I do hope i will be fine. Can pre-ejaculation causes pregnancy?
My personal opinion... If you don't know what causes pregnancy you shouldn't be having sex.
But if he is inside of you and pre-ejaculates it could lead to pregnancy but the likliness of that is very slim.
Makes me wonder what they are teaching in health class now. You're not pregnant and I highly doubt there's even a chance you could be. Just wait for your period and the more you stress the more likely you are to miss a period. Just keep calm.