Hi! I definitely agree with the above posts - but if you can't get a doula, don't feel like your hopes for the birth you want are lost. A helper like a doula is a wonderful thing, but there are other things that you and your husband can do to help you feel in control of your baby's birth. ( to some degree of course.) Discuss with your husband and your doctor what you would like to happen. If your doctor is not going to support your plans (and not for medical reasons) consider switching. (although I realize it's getting close to the end here for you)
I found that it helped immensely to try to remember with each contraction that the pain would go away again. (I pictured waves washing in, and out on the beach - maybe that would work for you) And try to breath slowly and deeply and tell yourself that you CAN DO THIS. Your body is made for it. The other thing that helped me a lot was to be in the shower or bath if you are allowed. The warm water felt wonderful.
Other than that, read as much as you can about what happens during birth (although I'm sure you already know most of it, having done it once already) and have your husband do the same. Try to think about what helps you relax when you are in pain (ie. headaches, etc.) and see if you can do that when you are in labour.
Hope this helps a little! I hope you are able to have the birth experience that you want - it can be an overwhelming time, and it's nice to feel like you can have some control over the situation! Whatever happens, I hope you and your baby are healthy and well when it's all said and done!
All the best!