My strip analyzer hasn't been working on glow. 🥲

Last month I ovulated on cd15. I know today's test isn't positive... But I'm worried that I'll ovulate sooner than cd15 this month. I usually only test once a day in the beginning and then go to 2-3 times a day starting cd10. But I may go ahead and start testing multiple times a day now. I just can't tell if this is a small surge after af... Or if I should call our donor and go ahead and start inseminations... Help, please!