prolapse
hate to say it, but i would bet my life you have prolapse--when your bladder and/or anus are falling out of you v-jay hole. had this after my first (also pushed for 3.5 hours). went to a physical therapist for the v-jay-jay (can you believe they exist?) who pretty much said the muscular integrity of my vaginal wall had been compromised by all the pushing.
solution: get back in shape. the vaginal wall isn't only kegels, but your abs, inner/outer thighs, butt muscles...all combined. the more i got back in shape, even when pregnant with #2, the more my vag was more like her old self.
if you look with a mirror you can actually SEE your stuff falling out of your hole.
have it again this time, but doens't seem as bad (as #2 shot out like a rocket--i'm guessing my long pushing with #1 paved the way well, so have hope there!). i'm anxious to start working out again.
drawbacks: husband said couldn't tell "that" much, queffed (sp?) during yoga for about 6+ months after birth which made it pretty impossible to go to a public yoga class...if it's really bad, there are surgeries that can be done for it, but not until you're 100% done having kids.
if you ahve more ?s, you can email me

it's a drag, but i guess pretty common!
good luck--
xo.lori
loriung@yahoo.com
oh! and engage your abs whenever you're lifting something heavy (baby in carseat, etc.). horror story from physical therapist = a women with SUPER bad prolapse actually did have her parts fall out when doing too much physical exertion w/o engaging her abs/core. ugh!