late period was 3rd November

Jane
I'm 28 days late on my period my last one was on 3 rd of November, I've almost missed two periods now. I'm due to go to the doctors on Tuesday for blood tests last hpt was xmas day and it was negative.
I've never missed a period unless pregnant i ovulate as use opk and had bloods done to check.
I keep feeling nauseous and last all day I've had this on and off for about 3 weeks now. Cramping stopped a week ago and also had some stopping two weeks ago which definitely wasn't a period.
Been to the doctors and been told I could have a blighted ovum and just got wait for bloods then scan.
How late where you when you got your bfp?