OK then....
1) Since she cheated on you and requested a divorce you might get the better share. Picture the FB message so it can help you out in court
2) Try to take the baby's custody, since she cheated on you what's gonna stop her from cheating again. So your child's life would be unstable if your wife took her, if she kept on changing houses the baby's condition would be unstable.
3) Never ever get back to her, even if she's begging, since she cheated on you once whats gonna stop her from doing it again ?
4) Dont move out of the house, until you get a court decision. Be stubborn with the judge for property.
5) Hire a good lawyer, or, if you have the right evidence you can win the case with out a lawyer.
And, good luck with your future. IF your 30 or 29, go find a new one, its not that late. I know you're heartbroken, but whining isn't gonna help........