holy cow Mrs Ping!!! That chart looks FABULOUS!!!!!!!!! I think you should wait just to be sure, but when I see charts like that on FF they usually test positive tomorrow or the next day (just based on the pattern and that last upswing). You're officially late, and truly late to... lol,you know when you ovulated so its not just a late ovulation.
If you had at least 1 other test, I'd also suggest maybe using afternoon pee.... stop drinking and holdl it for 4 hours, lol.
Do you pee in a cup first? then you can check the concentration of your pee before you use your test. I know my afternoon pee is often more concentrated in color than my morning pee.