When should i test?

ad • 31. Married. 2 step children. :) TTC #1 of my own.

I am currently 13dpo. My period is due on friday.

I tested at 10dpo and got a bfn.

I spotted the tiniest bit on 9dpo.

Im going to buy tests this afternoon.

Should i test tonight? I think i want to try to wait til at least morning.

What do you guys think?