I don't really know if I have any solid advice for you but I couldn't read and not leave a post.
Firstly, my deepest sympathies to you losing your baby. I don't mean to come across as patronizing in any way but I know all too well the heartache of losing a baby having lost two myself. The first one I definitely wanted to keep even tho I was in a rocky relationship. Unfortunately fate swung the other way and I lost my relationship and the baby at roughly the same time.
The second baby, I was unsure of wanting to keep or not and toyed with the idea of an abortion. I settled on the decision to keep the baby (am in a relationship with the father as we speak). My body took a turn and nature decided for me. It wasn't to be.
Words cannot describe the emotions a woman feels when she feels the warmth, love and joy of knowing she is carrying that tiny bunch of cells in her body. Her body preparing for the road ahead. Her hormone levels changing rapidly. The sickness, the fatigue, the dizzy spells and nausea. The sheer optimism for the future coupled with fear of the unexpected. The feeling of knowing that no matter what, you will care for and provide for this child from the minute that second blue line appears on that stick and will seemingly redraw the map of your life forever.
A woman becomes a mother the minute she realizes she's pregnant. All her efforts, energy and focus go into everything she can possibly do to provide a secure, loving, safe environment for her and her offspring. Her diet changes with pregnancy, she may give up habits that are bad for her health to look after her growing embryo. Her mindset, nay, life becomes all about being the best she can be in order to make sure the precious life inside her thrives.
When nature has a cruel, indiscriminate way of suddenly snatching that away if is a blow. The grief and anguish a woman feels at this point cannot be measured. It is the come down after the high. You'd give anything to feel that sicky feeling again. The pain hits you like a brick. Because preparing mentally for having a baby is totally different to the lack of preparation for losing one. That is the unexpected.
I have no words of advice. Only an understanding of your situation. I found counseling helpful for my first miscarriage as it also help me come to terms with my break up which occurred within a couple of weeks of losing my baby. It was amost disgusting, distressing and horrible time, one I would never wish to repeat nor wish upon my worst enemy. I wanted to end everything, I couldn't find a point to life and thought about ending things. The sleepless nights and not eating properly were horrendous, until they started passing in a blur and I stopped caring.
But.... My life did turn around. Counseling helped tho it didn't heal the wounds. I didn't really talk to anyone about things except my counsellor. The main thing which happened really was time. It's the old cliche about rims being a healer but its true. You need to give yourself time to grieve and try to look after yourself in the process. Focus your energy if you can manage it on your son. He needs you. You need him. And it does help to talk. It can't fix things but it does help. If you want a chat pm me.
Sending you massive hugs 
xx