Welcome Carrie. I'm very sorry to hear about your loss.
I agree with everyone else - stop testing! You may as well pee on $10 bills 'cause they'll give you the same results right now. Either way you're out $10!
I drove myself crazy my first cycle TTC - I think I POAS 6 times - all negative. Do what you can to distract yourself and don't test until at least 12 DPO! Good luck!