IB or AF?

At 7 or 8 DPO I had some brownish spotting when I wiped.

According to this app I was scheduled to have AF yesterday but only had super light brown spotting again only when I wiped, with kinda creamy thick cm.

Today, fully expected AF but only had VERY small amount of brown spotting on the tampon I inserted.

Have any of you experienced it like this before?

should I take a test or should I wait?

Other symptoms I've had over the last week have been:

-some cramping when going for walks on left side

-vivid dreams about random things last few days

-wokeup at 1230 AM two nights ago extremely nauseas

-some headaches at random times in the day/night (but I already suffer from migraines which come at random times)