Hello ladies!

*Sorry if my question seems stupid, I’m new to ttc and have never experienced this!*

My partner and I have been ttc for about 3 months now and this last cycle seemed strange to me. On August 27, a day after my period was expected to start, I began spotting. I thought it would turn into af so I let it be. It went on until September 3rd and hasn’t turned into af. It was super light (and most of it only came when I wiped) and the length and flow is unusual to me. But I’m not sure if I should read into it too much as it came around the time af was expected to come. Should I wait and see what happens this upcoming expected period (September 21st), test, or blow it off as af?