Crying a lot

Erin • I`m a Ftm and my son was born May 8 2016
Is it bad to cry a lot while your pregnant? I catch myself feeling lonely and depressed cuz I can't do anything and my boy friend is always gone, but when I am able to do things my body doesn't allow me to have much fun. Should I be worried about falling in a deep depression while pregnant? 😢 Is this a normal feeling?