I took four home pregnancy they came back positive. I went to see my primary care doctor to confirm the pregnancy. My doctor did a urine and blood test on me and they both came back positive. I went to visit the ob doctor Thursday. They did a urine and blood as well and it came back negative. They also did a ultrasound and they said they didn't see anything. I haven't had a cycle since April 24, 2014. Can someone please tell me what could be going on with me.

