If your chart is showing implantation, kinda like it looks, it could take up to 4 days for the body to start producing HCG. Keeping my fingers crossed for you! How are you with symptoms?
I would wait to see if your temp drops again before testing. I'm going to test tomorrow at 12dpo and if I get a BFN, I'm waiting to see if my temp drops or stays up to test.
For symptoms for me, though, I've been having hot flashes all day. My classroom was set at 70 degrees and my poor kids were freezing because I was so hot. I just took a Zofran (have it for some stomach problems), because I was also nauseous all day (maybe just from something I ate, trying not to look into it), cramping, and boobs are sore. I'm irritable, too, one minute happy as a clam and the next crying or angry. I almost feel like it's AF coming with the way the cramps and other symptoms are, though :-/