I would do it now. Why wait for pain? (Do it on a Friday so you have the weekend to recover. Especially if your husband has weekends off, so he can take care of Little Man while you are at the initial stage of recovery.)
Prep really isnt anything.... My husband went in with a toothache, came out with two wisdom teeth pulled.
Im not sure about he procedure itself...
Recovery is fairly short, but it does suck a little bit. I would advise taking the day off if you work outside the home. (My husband had to go back to work, and luckily his co-workers were sympathetic and let him be useless on the couch. Lol) You will have to keep gauze in the gap where the tooth was until the bleeding stops, and rinse with salt water after meals until it is healed. You won't be able to use a straw or anything that requires sucking until it is healed (so that the blood clots and stays in place to avoid a dry socket.) you will also want to get some soft foods, because you won't be able to chew for a while. My husband was given a prescription for pain meds, but only used it for he first day. (And he's kind of a baby about pain. Lol.)