Spotting in fertile window?

Yesterday when I wiped I noticed a light brownish pink spotting, now this morning I wiped and it’s this again! My period isn’t due for two weeks almost.

Last month of April, my period was due the 15th and for some reason was a week late! And didn’t come until the 22nd. Now this month, my period is now due the 23rd. I am in my fertile window right now on cycle day 16.

What could this be!?

This can’t be implantation can it? I just ENDED my last period like 8-9 days ago…

Help!?