Got pregnant head a miscarriage 2 month pregnant doc didn't say why

Got pregnant head a miscarriage 2 month pregnant doc didn't say why!.. I got so exited with all the baby stuff and knowing that a living thing was inside of me.. I cried over and over and asked my self why did that happen never got a answer but God knows better than me 13 months later still can't get pregnant every month o pray to see does 2 pink lines but unfortunately I am getting frustrated over it !!!!? I just want to be a mom 😞