well, at least you have help? a lot of young mommies get kicked out or their parents treat them like an outcast.
and things never go as planned, so it's good to have your mom as back up! she's just trying to take care of you.. I'm almost 20 and my mom is STILL trying to get me to move back home! they can't help it.. they just care too much.
if it's really bugging you, sit down and talk to her about it?