Help! 

So last month my period was due and all I got was what I think, spotting as it was extremely light and only went for 2 days. So I took a test and it came up negative, my food intake has doubled and I'm just eating 24/7. My breasts have doubled in size and in the last week they have completely changed shape, are extremely sensitive and sore and there are dark blue veins VERY visable from my chest that travel right down to the nipple. I have since taken several tests but all are coming up negative. I have been for an ultrasound which was 2 weeks ago now and that came up negative. I'm so confused, as the weeks go on I feel I'm getting more and more pregnancy symptoms. Now waiting on blood test results.  

Can anyone help??!