I am also a 37 year old father of 3. Also an addict since 18. Congratulations on your decision. Remember that yes -- your kids, wife and family will benefit. However, your decision to quit must be #1 for you. If that is the case then you will not run out and buy a can if you get into a fight with your wife and / or you have a rough day with the kids.
I just hit 90 days. However, I remember like yesterday my insomnia during the early part of my quit. For me it took about two weeks and melatonin helped some. I now use the memory as another tool to stay quit.
Also, watch out for the "fog". A lot of guys get it. I was depressed for about a month and I have never experienced depression in my life. If you find yourself raging or fogging out, call or text a fellow quitter. Or, feel free to jump into live chat.
With the help of your May brothers and other supporters, you will stay quit!!