I did a b-MCG test Result 19 and Reference 0.0 - 3.0 UI/L pathologist says I am probably pregnant? What does that mean? Am I Pregnant?

It means you are probably pregnant but it needs to be looked at by your doctor, who will confirm.

Have you done a simple pregnancy test at home/

Yes, I did the first home pregnancy test about 5 days before my menstrual period was about to start and got a very faint line, so I went for blood tests immediately and got the result of 19. The pathologist advised me to go back on this Wednesday but today I could hold the insecurity of maybe or maybe not pregnant so I went and bought another home pregnancy test and it almost immediately shown 2 lines! So I think that is maybe a good sign that my hgc is rising?