I went ahead and tested today. 11 DPO. Very faint hard to read negative. I had another temp dip yesterday, and back up high again today. I am disappointed in the negative, I guess just waiting to see if AF shows from here. If not, I'll test again in a few days.
It's very hard to stop yourself from doing a HPT when trying to conceive. 9dpo is a bit early. I'd wait another day or 2 and then take a First Response one (the one that says 6 days before missed period). It seems to be pretty accurate. Good luck!!!
I made a rule to avoid wasting tests and going through BFNs. I only test if my temps stay elevated at 13 dpo and my af hasn't shown up. If I see my temps go down, then I know it's going to be a BFN. It saves you a lot of anxiety, and nerves are not something that helps while ttc.
Good luck, hope it's your month!
hpt's can show a faint + at 9 dpo, but I think it is really pretty rare. Best to wait until 12 dpo. That's only 3 more days!