I'm sure my OB said 85% at 24 weeks and 95% after 30 weeks.
I had twins in my class come 9 weeks early aand they would have only that small. One had breathing problems and the other had a couple of ops but they are both super fit now and intelligent so have suffered no long lastng effects.
My OB said this was something that might happen. I wear pads during the day because I get a bit a discharge and it's more prominent if I have a poo/fart or am sick (sorry if TMI).
Today mine looked a bit yellow on the pad but it doesn't smell funny so I'm not worried yet. I will watch it over the next couple of days and see what it's like.
I get cramps everywhere not just my bikini line so it could be your uterus streching!! It depends how you are carrying your baby and there are loads of different ways, it says this in my book :)