I'm doing great and the baby is doing great!
The low heartbeat simply meant that it's not beating as fast as, say Makayla when she was at the same stage. The usually implies that the baby is a boy. Most boys in gestation have a lower heart beat than girls do.
I don't have a preference...but it would've been nice to have another girl so I could use all of the clothes that we got and didn't use on Makayla when she was born. LOL But, having one of each is great, as well!!