I have very regular periods they are never late. Well I'm now late and took a pregnancy test yesterday evening which was Bfn. Not sure when I o'd as me and my husband aren't really ttc nor are we trying to prevent it. Here's my question. I had been drinking water like crazy yesterday so is it possible I got a fp test because my urine may have been diluted from all the water I drank ( it was barely yellow) even tho I was expecting my af the same day? The only symptoms I have is slight breast tenderness and peeing alot more. Any help would be appreciated.