Pregnant finally! Maybe.

Ashley
Got our BFP after m/c back the begining of June. Still unsure of how far along I would be. Don't think that it would be a false positive but it was at the doctors about three weeks or so ago to recheck my HCG levels and thry were negitive. Anyone had this happen? Possible that it wad still wayyyyy too early when they retested my levels? I havent had a period since I got pregnant the first time and I have felt sick which I tjought was from the birth control. My boobs have almost doubled in size. I am so confused. I know this started out as a I think I am. Now its turning into a unknown. I did take a digital that clearly read pregnant and a Walmart one that had a very very faint line. Thoughts?