Accuracy of pregnancy test two weeks after possible conception?

Hello,

I am pretty sure I am in the very early stages of pregnancy... I took a pregnancy test around 13 days after our possible conception dates. It wa negative.

I have been pregnant once before and I feel very very similar to what I did in my first pregnancy. I am just wondering whether that was too early to test?

I will definitely try again soon of course... but just seeing if it would of come up if I was pregnant