Re: Rib pain
I'd venture to guess it's stretching going on of ligaments or something in there. At 19 weeks, the baby isn't big enough to be doing much painful kicking (if you're feeling the baby, you are probably just starting to feel it, or will in the next few weeks). Also, your uterus is getting big, but not big enough yet to really displace your organs to the extent of the discomfort you feel.
I've had aches around my ribcage, diaphram, and that general area since about 15 weeks or so, and it hasn't gone away yet. Sounds pretty normal to me.
Gayle / 28 Weeks