Which pregnancy test is best?!

My hubby and I are trying to get pregnant. My period was supposed to start October 5th(3 weeks ago) but still hasnt. The 27th will be 2 months since I've had a period. I've already taken clear blue, first response and new choice (dollar tree). ALL NEGATIVE :( I take the tests first thing in the morning. I've been doing about 1 test a week since the day before my period was supposed to start (I'm excited lol) is there another test out there that is way better?! Or am I doing something wrong?? Please help!!