Or am I pulling at straws?

We are starting to try for baby #2 and there is only one chance that I could have gotten pregnant, the day after my period ended. My cycle is always 28 days, but I am not sure the day I ovulated because I wasn't keeping track this time. Basically, was that way too early to even think of getting pregnant? I have been feeling like I have symptoms, but maybe they are just in my head...super bloated, backaches, headaches, and yesterday I felt a few twinges/pinches on the left side of my ovary area. Today, mild cramping and the tiniest spotting, only when I wiped (sorry, TMI). I have taken two tests, both BFN, one yesterday and one a few days before that. AF is due tomorrow, so maybe I am just holding out hope. Anyone else with similar stories care to share? Thanks ladies!