Am I pregnant??

Ashley
Okay, so I recently took an ept(digital) because I just felt and still feel off. Nausea, fatigue, back pain, etc., and it came back positive. The next day,i went to the health deptartment and she had two come back negative. Could it have been that theirs didnt show up because the one i took was  an early one??? How could i get a false positive?? I even went to the hospital and they said it was negative. Someone help??? SOMETHING isnt right.