Signs of pregnancy with history of irregular periods

What signs/symptoms did you have that made you think you were pregnant before actually getting a BFP? My periods are SUPER IRREGULAR! I use glow and 2 other apps to track my period and they all tell me my period is due to come at different times. 😩 according to glow, it’s late by 3 days but please know that a “late” period is not uncommon for me.

I noticed earlier that I had a tiny bit of spotting (like the slightest) in my underwear when I went pee. When I wiped there was nothing so I thought I could be my period. When I went to pee later there was nothing on the pad but when I wiped there was the slightest faint of blood. I noticed cramping yesterday but again, I just thought it was AF coming. Wondering if this could be implantation bleeding? Is it super light? Please help!