physically, you don't feel anything during the proceedure, unless it's a partial birth. If it's a partial birth, you physically go through the labor process. I've never had kids, but, I've seen enough being born to know that labor is pretty painful. After the proceedure, you feel mental as well as physical pain. You'll go through post partum depression, bouts of guilt over your decision, and survivors guilt (mental pain), and your body will have to heal; because basically they are outpatient surgeries. Any time you have a surgery there is healing time, and pain involved.
(Couldn't use the "A" word lol.. had to improvise)
I don't know about physically but I now that mentally you would regret the decision and it would be something that would haunt you for the rest of your life. You would be thinking what they would've looked like and what they would've been like.