well im 19.

i had sex on Feb 12. it was my first time. and i just finished my period a day or two before...but i cant remember which. anyways it was unprotected. because neither one of us had a condom. which we told one of us to get but end up not getting one. anyways when it was his time to cum, i told him to pull out and he did...he cummed on my stomach. well lower stomach anyhow. but i was just wandering if it somehow reached down there and i am preganant... and another question how long does sperm live until it dies ...