anyone ever just known they were pregnant but it took forever for a bfp?

Alyssa
I had pink/light red, super light spotting a week before my period was due. I've been feeling Naseaous off and on throughout the last few days. I wake up in hot flashes. I've been having very vivid dreams.  I swear my there's something going on but I just keep getting negatives and/or what I thought were super faint lines. I would be about 5 weeks. I feel like I'm going crazy!