Experiences with spotting

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Hi ladies, I’m on my 19th cycle ttc. My AF is due today and I haven’t had my usual symptoms leading up to it - no breakouts, no achey legs. However, just wiped and had some pinkish red blood. Thought - great AF is here. But it was literally just that wipe and nothing else.

Normally when AF starts, I feel like i was hit by a truck. It just hits me then I know to go check and bam - AF is there. So it’s weird that I had this spot. I’m sure AF will show since it’s been 19 months and I’ve lost hope.

My question is- has anyone experienced this. Got a BFN then AF not show up and get a positive later on?