Last Period on Dec. 22nd! Negative Blood Test...Still no periods?

I'm not sure what it could be, I have read that many women have had negative blood tests but still wound up pregnant. I guess its more common than you think, however I know that missing a period can be related to other health issues as well. I'm in the same boat as you and I know how frustrating it is. My last period was also December 22nd, and since then I've had some minor symptoms of pregnancy but have had negative pee tests. I go to the doctor on Wednesday, hopefully they'll be able to tell me whats wrong. Good luck and I hope you find something out soon.