Really don't know what's wrong?

Hailee • Married June 2014. TTC since Aug. Lost baby #1 at 4 weeks on New Years of 2015.
So iv taken four first response test. All positive. Went to the doctor and they couldn't do a blood test only urine. Got my results back today neg. I should be 4 weeks along. I have no clue what is going on. My heart just hurts?