How does one not get their hopes up?

AF was predicted to start on 11/24. So far glow has been right on every AF start day, practically to the minute. I’m extremely regular, and now 2 hours short of 4 days past due. My fiancé I were/are trying not to get our hopes up. We got some

Tests and the one I took was a BFN 😩 I’ll test again if It makes it to 7 days and then head to doctor not sure whats up. I really hope its a baby and not something wrong with me. His sister just had a baby and its been really hard for us, she’s younger, we are 34. Anyone gone through this before?