T.H.
Congratulations on your upcoming birth!
Remember that every pregnancy (like every child) is different and the reason for not dilating the first time may not exist this time.
You don't say how long you were in labor the first time or what constituted an "emergency" c-section. Was it for failure to progress or was there an actual emergency? I have been a doula at the births of 333 babies and have only seen one actual "emergency" c-section in 12 years!
The risks associated with a c-section are GREATER than the risks associated with a VBAC, as long as your labor is not induced. Your body was able to grow a perfect baby -- there's no reason to think it doesn't know how to give birth!
Trust your body to know what to do ... but it doesn't hurt to help it along in any way you can, like seeing a pre-natal chiropractor (I can recommend several if you're in the Los Angeles area), see an acupuncturist, walk, swim, and stay well hydrated so you don't have another long labor :)
Happy Birthing!!!