I just have to say it:

Stop it!

Easier said then done, correct?

You're stressing yourself out. Mentally and most likely physically too. We need to remember that we shouldn't be testing until close to or after missed AF.
Testing before hand just stresses you out, and probably isn't helping.
IMPLANTATION DOESN'T OCCUR UNTIL 6-12 DAYS AFTER OVULATION. AND USUALLY SYMPTOMS ARE NOT FELT UNTIL FOUR WEEKS.
THEORY: BECAUSE we're ttc we over analyze every. little. thing our body is doing when in reality..if we weren't ttc we'd just shrug it off.
I had implantation cramping/bleeding at 12 dpo and two days before my missed period. I didn't get a BFP until FOUR days after that (two days after missed period).
You're not out until AF shows her nasty stupid ugly horrific face.

So stop stressing ladies! Go with the flow and try to hold off. Occupy yourself with educating yourselves and helping others. It'll be worth it in the end and you'll thank yourself later.
Achieve your health goals from period to parenting.