Okay, if your temp shifted on the 4th, then let's go off of Feb. 3 as your O day. That would put you at 10DPO today, conservatively speaking. That's much later than I thought you were talking about in your earlier posts. So yes, all the tests you've taken could easily be too early. The blood test on Friday would therefore have been on 7DPO and yes, that could be too early, too. Implantation occurs between 6 and 12DPO and 84% of the time between 8 and 10DPO. So technically the embryo might not have even implanted yet! The embryo really starts producing hCG when it implants and it would take a few days to build up to a high enough level to test positive on an HPT. A blood test would reveal things sooner and usually anything over 5 is considered pregnant, though some doctors have a higher cut off (like 10 or 15). Hopefully you got the quantitative test and not the qualitative so that you can see what your actual level is not just get a "yes or no" answer. If your doctor does give you a "no" answer, ask if the hCG level was recorded and find out what it was. If it wasn't determined, ask what the cut off level is.
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Even if you did O on the 1st, that puts you at 12DPO today and the blood test at 9DPO. Again, everything could be too early, though it's more likely that the blood test would be accurate at 9DPO. I am anxious to hear the results of that... hopefully today! Call the office prior to close if you don't hear anything by then. And if you are 12DPO today an HPT should be accurate by Wednesday if no AF. But if you're only 10DPO today then I wouldn't be surprised if you needed to wait a couple days longer for AF to show/get accurate results on an HPT. Good luck and keep us posted!!!
