I keep feeling sick to my stomach, tired, cranky, and I feel just like i did when I was pregnant with my son. During that pregnancy, I had a blood test done at about 9 weeks and it was negative...I went to my doc and he did an ultrasound and found a heartbeat. Should I trust the blood test I took or should I get an ultrasound done. My lasy normal period was nov. 22. The 13 of dec i had about half a pad of blood then nothing...?