in a word CRAP! My pelvic floor turned bad while pg with DD and since her birth I have had a prolapsed bladder and uterus. I'm working with a womens health physio and it's improving slowly I've never had an accident (touch wood) but do experience some LBL when I'm horse riding if I have't been to the loo recently. I recommend the physio and if you don't want to you don't have to take your pants off they use an ultrasound machine to see if your pelvic floor muscles are working.
Good luck and hopefully it improves soon.