confused about dates. any help?

[mummypearson]

hey everyone.
Trying to figure out how far along i am. by due date calculators online im 9 weeks, that's going by the first day of my last period 24/3/13. The only thing is i know i didn't have sex until 6/7th of April. so what does that make me or do i still go by lmp?
Many thanks xx

 

[SBinRI]

Always by lmp.

 

[quin]

Definitely LMP. You're already a couple of weeks pregnant when you actually conceive as its easier to base it on your LMP as not everyone knows when they ovulate.