HOW DO I DEAL WITH THE LOST OF MY 1 YEAR OLD SON ?

I'm so sorry for your loss. That would have to be very painful. The loss of any loved one is. Especially a child. And more so while possibly feeling some post pardon depression. I hope that I can possibly share with you a few things that have helped me cope with loss like that. It may not help you, but I hope it may.
When things like this have happened in my life I've found it helpful to take time to mourn. It may sound like a no brainer, but if you don' t go through the pain you're feeling then it will likely linger and you'll have to continue to deal with it.
I've had times when I felt like the pain wasn't ever going to end. Then I realized I was hiding from it- avoiding it and trying to cheer myself up so I wouldn't have to deal with it! My Dad counseled me "The only way out of the pain is through it." NOT what I wanted to hear. I've found that it was however what I needed.
Things like this you would never wish upon yourself or anyone else (hopefully). They are scary to deal with like a roller coaster that you didn't want to ride and wound up on anyway. Emotionally they really can be a roller coaster. Allow me if I may to compare the two for illustration. I'd never ride one that I didn't watch a few times first- the reason is I want to see people come out safely on the other side and know that if they came out all right then I will too.
Talking with other women who have come out all right may be the thing to give you the courage to mourn properly. A few things you may want to remember is that you are a daughter of our Heavenly Father who created you, loves you, and knows that you're strong enough to handle this trial. No one is tempted or tried beyond what they're able to bear. (1 Cor 10:13)
They say that time heals all wounds. I'm not sure about that. I do know that love does. Take time to love yourself, your family who's still here, and take time to love your baby who is now with your other family members who have gone on before. God bless you and bear you up. I know he wants to and will as you ask and allow him to do so! You're on the right track and you're going to be OK.

I am so sorry for your loss. I wouldn't wish that on anyone. Unfortunately I don't think the pain will ever go away. Time heals, but knowing you have a beautiful angel watching over you is something to remember as well. Talk to people, don't hold your emotions in. Know that people care about you... even perfect strangers. Wishing you strength and peace. Kate