Need your opinions

After being 11 days late (with negative pregnancy tests) I started bleeding very lightly for 2 days.

I have a typical cycle, 28 days for 5 days. The first day is light, the next 2 days are heavy! The last days are medium.

So, this is not normal for me. Never in my life has my period been off, late for no reason, or light. I also didn't get pms'y or crampy in anyway.

How strange.

I was trying to add this spotting as my period in Glow but then it throws my entire calendar out of whack.

Which got me wondering.... was this my period? Or spotting?

Anyone have any thoughts or advice?