Inconclusive blood pregnancy test

My husband and I are on round 3 of IUI fertility treatments and after the longest TWW, we had a blood pregnancy test yesterday that came back as inconclusive....not postive but not negative. My hcg was at 9.5 and progesterone at 7. Im going back Friday for another blood test. Major finger crossing those hcg numbers have doubked!! Anyone else here experience this and what was your outcome?