Asking

Can i ask some something because im just wondering why?? I got my menstruation last dec.10 to dec.13 and i expected my menstruation coming this jan.11 to jan.14 but my menstruation not come so i decided to buy a p.t or ( pregnancy test) by jan.16 i tested and it's 2line but the other line is not really clear.. so i tested again and it's same so i was expected that I'm pregnant but this jan. 19 my menstruation was out.. it is possible that i got pregnant but i lost my baby??