Has anyone had their blood drawn at 10DPO?

I wasn't even going to post this on here because I don't want opinions as to whether it's negative or positive (uploading it deminishes picture quality, plus it's faint anyway). Today I am 11DPO, but I got a positive test (of course the line looks darker in person) yesterday at 10DPO, I should have been 3W, 3D. So, I went in for a blood test and it came back as "not pregnant". I am going in for a repeat next Wednesday (one week after the first blood test). I tested again this morning and the line is getting darker! The nurse said it's possible that I'm just REALLY early, causing a false negative, but has anyone had this happen and gotten a positive later on? I can just FEEL it, I KNOW I'm pregnant. I will keep testing every morning to track the line, but in the meantime... Help!