Gah. Sorry I'm on my phone and it wouldn't let me scroll down to the bottom of the post to add the last bit. I was just going to say:

So I am just after some advice from those of you who have more experience with this than I do. Is this just my period rearing it's ugly head? Is it a definite no based on the blood results? Even though the doctor said it may be too early, I know how sensitive the blood tests can be, so I assumed if I was pregnant, it would show up on that test. Am I wrong?