My only advice would be to give it time.
Time heals everything, yet it may still end up in divorce. If you don't want divorce and want to fight for your marriage wait and maybe when things start to get less stressful tell him if he'd be willing to go to counseling because you still value your marriage and still love him.
A lot of couples divorce because one or both are too proud to say what they are feeling. Some could be saved if either one, or both expressed their desire and love instead of taking the easy way out.
Do not do it for your baby, do it if you still love him. The best for children is to see a healthy marriage or a healthy separated mom and dad.
Good luck and be strong, remember also that nothing you can do or say can change his feelings. If he still loves you he will come back to you, if not at least you tried and can walk away w/o regret.
Peace be with you