I don't know about the sharp pain, but I have had it before too, so I just stopped having sex. But if you're concerned I'd talk to your midwife or doc, see what they think. I also felt really sick, plus its now near impossible to find a decent position cos my bump is so big now, it made sense to just give it up!

Unless I go overdue, then I will be borrowing my boyfriends services. I'm sure he won't complain.

lol!
As for the discharge, I know an increase is normal, but I know what you mean, cos I have so much its unreal, and I've been checked for infections etc', nothing! So I'm assuming the ammount I'm having is normal, again if you're concerned probably best to talk to your midwife cos it could be an infection or something.
Hope that helped.xx