I think that line is an evap. Can you test with another brand? The doc shouldn't be able to tell this early by examining your abdominal area or even with an internal exam. The only way to tell is a blood test & possibly an u/s, but most likely not, probably too early for that too. Good luck!
I just realised where the lines are, I can see them now. I agree with your doctor I think that could be an evap line. Did they not offer you blood work?