Implantation or early period?

Hi guys! How are you? Well, me on the other hand kinda feeling confused. I would love to have some help on this one.

I took a test First Response 6 days sooner. [9DPO *today*] (negative).

Taking another one tomorrow.

June 11th,2019 is the day I Had sex on which is one of my fertile days (4 days before ovulation). I get my period on the 29th-30th of the month. Usually, it’s irregular. Fortunately, I’ve changed my diet & exercise habits so it should and has been on time.

Any thoughts?

Thank you!