when to check

Well I was just wondering how many days from conceiving can you do a pregnancy test?
Its been 12 days after the day of conceiving on ovulation day, do you think its to early to check? I did a test last Wednesday , but got a - , but it was then only 7 days, so I reckoned It was to early. just so excited. im due to start menstruating on Saturday if not pregnant, is it better to wait and see if I am late and the to test or can I do a test?

01
    08/25/14
    Comment deleted
    08/25/14
    Laura, I also cant wait, but did test and got a dark line with a faint line but think its an evaporation line. so will now wait till Saturday to see if I start. don't know if its because I did it in the afternoon or what, will try in the morning when I test again.
    1
      08/25/14
      Will let you know thanks Laura. :)
      1
        08/25/14
        I think you might be able to go ahead and test, but waiting til you've missed your period may not be a bad idea.
        1
          08/27/14
          And so it was pms, :(. started yesterday morning with my menstruation, oh well try again next month.
          0
          About Sam
          Birth: June 17
          On Moms.com since: Jul 10, 2014