Hi, I am kind of new to this, so don't know if what is happening is normal.

Here is my situation.

I am 21 years old and came off of the pill soon after we married in september. I got my periods and it was normal, lasted for 6 days as it had always.
My husband and I decided that we would try and have a baby in the small time frame window and then not try again until next year. since then I have tried four home pregnancy tests and they were all negative but when i didn't get my periods last week I worried a little.

I went to the doctors yesterday and had a blood test and the result was a negative but I still don't have my periods. I am now 8 days late but I have never been this late before, maybe two days but not eight.

Is it possible the blood test could be wrong?

I haven't had a lot of symptoms like I have read some of the other girls have had. I have had very sore nipples, and tiredness but thats about it.