Some quick advice...
Quit now. Don't wait for the fake stuff to arrive. Who knows if that next dip of skoal could be the one that sets the cancer process in motion.
Don't quit for your son, your wife, your unborn child or for the sake of money. Quit for YOU and YOU only. Quitting for them is good motivation and jumping off point, but ultimately you need to do it for yourself.
I know you have this happy vision of telling your wife your quit when your baby arrives, but I think you need to tell her now. When you quit you are gonna be a moody, agitated, and grumpy as hell. You won't be able to hide this from her, and she will want to know why. You may not be "in the clear" in 95 days, I'm sure if you tell her now that you are going to make a REAL go at this, she will be nothing but supportive.
Remove the word "hope" from your vocabulary. Hope and luck don't cut it here. Hard work, your word, and brothethood do.
Now do yourself a favor. Read the welcome center at the top left of this page, and get your ass to April '14 and post role. Don't wait. Do it now.
You got this. We will help you.