I am so sorry that you are going through this. Having gone through divorce, I know it is not easy. You have received some excellent advice here. I especially agree with the points of Cheryl O.
When looking for a lawyer - DO NOT choose the first one you interview. Interview at least 3. They all give consultations for free. You do need someone to represent you - and be in your corner. Do your background checks and see how their previous clients feel about the representation they received. Divorce lawyers have different philosophies. Some of them go for the juggler, others have a more healing process with mediative processes. I would also ask the question " My husband has retained (insert name of your husband's lawyer) what do you know of him/her and have you ever worked with him/her before."
While I think mediation is crucial, especially when children are involved, all mediators are not created equal...be ware. Some are more skilled than others and truly have an equal settlement in mind, for others its just a job. You want the first, rather than the latter; their recommendations will stick with the court.
You are already assuming that you will be without your child 1/2 the time. Ask for sole custody and give him visitation rights.
I took a copy of everything from the house and then some. Of course, my former husband had been divorced before and he knew the rules of the game, thank goodness I could see the writing on the wall. Luckily, I took a copy of the credit card bills and was able to establish that after he asked for a divorce he went out and bought a $4,000 boat motor - for which I would have been 50% responsible for, but a good lawyer got me out of that one.
You are entitled to an annual review of his salary and an adjustment to child support if the DISOMaster (sp) shows that by salary guidelines you should receive it. Exercise this right.
NEVER fight in front of the child or bad mouth your ex in front of him/her. Do not use the child as a pawn. Always do what is best for the child.
Lastly, forgive and move on. I especially recommend Debbie Fords book on Spiritual Divorce. It will guide you through the process of learning the life lessons available to you through this situation, and allowing this to be an opportunity to grow as a person. A good coach trained assisting you through life transitions can really help with the forgiveness and healing. I'd be happy to give you referrals if you need them. You may be able to have HIM pay for this under the right circumstances.
Blessings,
K.