My period is late by 4 days. I have taken probably 10 tests in the last week and a half. All faint line positives. Even digital tests that clearly read "pregnant". I took another one today and it's even darker positive. My husband and I are pretty convinced I am pregnant. We have a sonogram scheduled for Sep 21 with my gyno. This is my first and we have been trying for a year, so I am really excited but also worried. I take ambien every now and then (every two days or so) to help calm my nerves and help me sleep. I've been reading article after article about how ambien could possibly cause a false positive to appear. Does anyone know if there is any truth to this? I haven't taken one since Monday (so it should be out of my system) and I got a clear positive today. Am I just worrying to much?