Have you told him you have been sitting there contemplating suicide? You have to tell him, you have to tell SOMEONE.
loflo is right, go and look at your son - he NEEDs you, you are his mummy and he needs you to be there for him. No matter what happens with your DH, you have your lovely son.
I don't know the history with your DH but it might not be over you know, you feel so shit just now that you are not thinking straight - what has happened lovely? Do you think telling us would help? Don't worry if you don't want to.
Samaritans - fantastic, will listen, get you through the here and now, then if you are strong enough, give you numbers of local places to go for help. I want you to go to see your doctor on Monday and tell them what you have been feeling.
Is here anyone you can talk to in RL?
We are here for you. Hold on tight xxx