Im currently today 6 weeks pregnant and ovulation started the 16th of feb yet i had sex on the 13th of feb. im confused?

Sperm survive!: It is very possible to have sperm survive three days or longer after ejaculation. Only one had to still be around on the 16th for you to conceive.

Pregnant : Pregnancy dates are traditionally given counting from the 1st day of your lmp, which probably was close to feb 1, making this week 6 by calculation. Remember that these"dates" are approximate and can be better estimated by us measurements of developing fetal measurements later in the first trimester. Also, sperm can survive up to 5 days and likely combined w/ the egg 3 days later.