Hi all! I am unsure when I should be testing. I had unprotected sex on the 26th of May, as well as a couple times after that. I thought I was already 10dpo, so I tested yesterday morning (invalid test) and this morning (negative). I’m new to this app and realized I have a chart- based on this, when should I test?

(For context of why I’m wanting to test- I’ve been nauseous and vomiting for the past week, feeling lightheaded, having regular headaches, and my breasts are sore, all of which is unusual for me.)