Me and my Husband have been TTC for a year now. AF was scheduled on May 5th, on May 3rd I started having really thick brown spotting, this lasted 3 days. AF didn't come on the 5th and I'm now 6 days late. I've taken 2 tests and both came back negative. I'm usually regular and never late. I don't remember if I had IB with my daughter, but could that brown spotting have Been implantation bleeding? Have any of you taken hpt and them come back negative but have actually been pregnant? I've been slightly bloated and constipated, I normally go every day but I haven't been in 3 days. How long should I wait before another test and/or go the doctor?