Have you checked out: http://www.parathyroid.com
? I think they talk about flucuating test results etc....they may have some helpful info for you. I had all the test run at the same time & kept coming up normal (but felt lousy). If you had any "abnormal" tests...maybe it's worth another try? I know you're feeling too lousy at the moment to consider this...but maybe you would want to expose yourself to some sun right before the blood is drawn?
I guess I have to conclude I don't have it, but it sounds like it may still be a possibility for you.....don't know for sure, but if you can stand trying again....it may be worth another look...