Can a BFP appear later throughout the day?!?

Mallory
Top was last Sunday, bottom was this morning. Looked at this morning  after walking the dog for about 10 minutes. BFN. Tossed it in the trash. We recently started TTC and I'm already obsessing. Out of curiosity, I dug it out of the trash (at 10PM at night, took it around 8 AM). So BFP or Evap line?!? I'm buying more tests tomorrow that aren't blue ink in hopes of a more clear answer. Don't want to get our hopes up! Any advice, has this happened to anyone that had either BFP or BFN!?!?!? Just wondering if BFP could appear after I had checked this morning?!