Question! Please help!

So, my boobs only hurt when I’m pregnant. My period is due to start on in 8 days (on the 16th), so I know it’s early to take a test. Well, this morning I woke up with my boobs hurting and watery cm. I took one of the First Response Early Result test (which detects hcg at a 6), but it was negative. Do you think despite what I’m feeling only when I’m pregnant, it’s still go early to pick up even on a sensitive test? Attached are the clear negatives (unless you can somehow tweak it to see something I can’t, lol)