Advice Please

Hello ladies, well on the 29th of June is got a peak on a ClearBlue digital and according to that u ovulate 24-36 hrs. Now my question is I have been getting negativs on tests but today I decided to wear a pad thinking AF was going to come which is the 16th. I have a 29-30 cycle and I ovulated between the 29/30 maybe even the 1st but when I went to the restroom I had a tiny brown stain on the pad?? Could I still be pregnant? I'm just wrecking my brain cause I tested today and it wS negative.