You don't say what your first was, but scheduled c-sections are generally much easier to recover from than unscheduled ones. True emergency c-sections are very rare.
Have you been able to discuss your pain control with your doctor? There are many options available and you have a right to have your pain controlled. Do not hesitate to demand better pain control following your surgery- it will help with your healing and make the time so much happier for you.
Ask your nurse to show you how to splint your abdomen with a pillow when you are moving or coughing. Use a pillow to support the baby when you are breastfeeding (if you choose to). A binder on your belly (you can get one from the hospital) will help with pain and movement. Take stool softeners! Drink plenty of water. Rest!
Lastly, if you are this concerned about the c-section have you considered all your options in terms of v-bac? Obviously you have to weigh the risks of repeat c-section with v-bac but perhaps at least a trial of labor would be an option for you?
Good luck and congratulations!
Just wanted to add some VBAC info since that seems to be a hot topic. Routine repeat c-sections are actually not recomended by the American College of Obstetrics and Gynecology, World Health Organization, or the Center for Disease Control. There is a risk of uterine rupture, .04%, slightly higher than the risk of rupture in a woman who hasn't had a previous c-section. Many doctors perform repeat c-sections out of pressure from insurance companies due to fear of litigation (women rarely sue for unnecesarry c-sections). C-sections also carry risks for mom and baby as well as risks for future pregnancies, so don't make a decision without weighing both sides. Here is some info:
http://www.nlm.nih.gov/medlineplus/cesareansection.html
Good luck whatever you choose!