I'm sorry to hear you'll be on your own - that must be quite scary. BB has some great information on doulas and birth options. Where are you based? What hospital are you booked into? Private or public? The reasons I ask is, there may be ladies here who can help you with advice based on your situation. There are also doulas on the forums.

BB has some great articles that might help.
Doula Revolution - Doulas At Birth
Hiring a Birth Attendant or Doula - Questions to Ask
Saying 'No' to Unwanted Birth Support People
Hypnobirthing
Hormones In Labour & Birth - How Your Body Helps You
Caesarean Section or Vaginal Birth - What Difference Does It Make?

You can always get a taxi or an ambulance to hospital or maybe one of us, if you live nearby. One concern, if you're on your own, is being able to even lift your baby after a caesarean. A friend of mine slept in a chair at home for about a week after her caesar because of the scar/pain and had to call her husband to come and lift the baby so she could feed him every few hours. Is your hospital/midwife/OB aware you're on your own? They may be able to organise some support for you afterwards. I don't know, but it doesn't hurt to ask.

I haven't yet done it myself, but I've read stories of women in unexpected circumstances (even without support), who have found an amazing strength to birth their baby however, whenever and wherever they are. Many of those stories are on BB. You may really surprise yourself when it comes down to it.

I hope it all goes well.