hello, I had a miscarriage in the month of February 2015. Before that, I had my last period on 15th December 2015. In later ultrasounds, we got to know that the baby had stopped growing when it was around 5 weeks. We never heard its heartbeat. The bleeding started on 19th February 2015. After that my husband and I had unprotected sexual intercourse around 13th March 2015. I have not had my periods until now. I tested using a urine test kit and it showed positive pregnancy. However, when we took an ultrasound test yesterday, it did not show any baby. Could I be pregnant?