Spotting before period and now nothing

So... I am due on my period tomorrow, 2 days ago at 10DPO I went for a jog and afterwards saw a couple of spots of brownish blood in my knickers (sorry tmi) so I thought AF was coming early.

Yesterday I had a bit of spotting but only when I wiped and it was only twice (again it was a brown/rusty colour) today so far there has been nothing at all.

Could I still be in with a chance?! Hoping it stays away and wasn’t a sign of AF.

I have had constant headaches for the last 4/5 days, feeling dizzy and tired