A blood test (beta-HCG=beta subunit of human chorionic gonadotropin) is sufficient only to diagnose that there is a pregnancy. However, it is not enough to confirm whether the pregnancy is uteral (in place) or ectopic (cervical, tubal, ovarial, abdominal, etc.). To check if a pregnancy is tubal-ectopic, you might want to visit your gynecologist who will perform a pelvic exam and an ultrasound, by this confirming if the pregnancy is in place or ectopic.