Yawning hurts - arg!

This isn't a new thing for me as it's been happening for a few weeks but it's becoming more bothersome - it hurts to yawn! On the inhale for most yawns I feel a jab under my ribcage and I think that it's more bothersome because I'm yawning more frequently as a result of being short of breath more frequently (yawning more for oxygen than out of being tired) thanks to Baby Olsen's rapid growth and increasing pressure on my organs. Ah what fun! (not!)