Are you worried about having a big breech baby?? I am with you, lol! I will be 36 weeks thursday and my little girl has been breech my entire pregnancy. They wont even consider turning her untill 37 weeks. She has been measuring above the98% also. At 32 weeks she was measured to be around 5 lbs 15 ozs. I dont think your cervix is a big problem so late in your pregnancy, especaily if your not dialating or anything. Has the doctors talked to you about trying to turn the baby to head down?? Why are you thinking c-section?? Are you worried about not getting to the hospital in time because your last labor was so painless?? And of course you only knew it was labor because of your water breaking?? I would share your concerns with your doctor, s/he can start checking you more often and maybe ease your mind by trying to turn the baby:) Good luck with everything, trust me its normal to worry. I have had most of the same thoughts as you running through my mind for the last few weeks:( We are almost there though!!!
At 36wks I don't think it is a big deal that your cervix has started to shorten.. i think that is pretty natural.. some people even start dilating now but don't actually go into labor until several weeks later...
I think it is just the natural progression of things... try not to stress.. even at 36wks, you will have a beautiful healthy baby...