N.C.
From one N. to another. I recently read a great book called, Sex Begins in the Kitchen by Dr. Kevin Leman.
It's a good read and you might find some rekindling tips.
Maybe you are associating your intimacy with another child. If you are safe and responsible that can be controlled. Have you been tested for post partum depression? I'm no expert but I have had friends who's lives were turned upside down after child birth. Just a suggestion to talk to your Dr's about.