How long should I wait to take a pregnancy test?

Melissa
Good morning, I'm a little upset this morning b/c I took a pregnancy test but it was negative. I'm a week late as of yesterday but the test should not pregnant. I'm hoping that I just took it too early....maybe I should wait til I'm 2 weeks late? I am trying not to be sad but I am a little depressed about it. Trying to cheer myself up with the fact that maybe it's too early to detect.....so please if anyone can give me some insight about this......I seem to have most of the symptoms but I am still scared. Please let me know if anyone has had the same experience and they ended up pregnant. .. thank you. :)