Ever wonder if Mumsnet is a psychological experiment on the morality of the human psyche? Take this post for example, if this is a test of the humanity and kindness of a person, get subject to walk into a room where a heavily pregnant woman on the ground crying, the test is the following, they have the option to a) help her, call for help, reassure her and offer her compassion or b) Kick the shit out of her, whilst laughingly telling her it's all her fault and she deserves whatever has left her crying on the ground.
The majority of test subjects go for the humane option because they are compassionate human beings! Unfortunately, there are actual assh*les who come along and choose b), slow clap people, no you haven't won anything, you have been proven to be a human without an ounce of humanity, compassion or empathy, yup you are a grade A bad person! I bet you are feeling pretty good about yourself now! Superior even!
Actually OP, your DH is a special kind of bad person, as he is meant to love you, he walked into the room, kicked you whilst you were down and then waltzed out without giving a single bit of concern for his heavily pregnant wife and the child you are carrying!
You do not deserve to be treated so poorly by your husband, his response has me concerned that he is at least emotionally abusive!
I would sit him down and ask him if he has any empathy or compassion left in his heart for you. His answer will determine what you do next. If he has none, then I would ask him to leave as he is making life harder not easier for you. Do you have a friend or family member who can come to stay with you for a while? I would suggest going to a relatives/ friends home but having a 10-year-old autistic ds, I know this is not the easy option it sounds written on paper!
I have been where you are with a DH who worked away for weeks at a time, the difference is he is a fantastic DH and father. He would take over with ds when he got home and run me a bath! He took over the housework, the cooking and all the physical carrying and caring of our ds when I was heavily pregnant and had severe SPD (which left me in a wheelchair and eventually hospitalised for six weeks). My DH is a devoted and loving DF though, your DH is not and I would want to know why! If he has always been this way then he definitely needs to look at counselling to explore his lack of care for his child. If his disdain for you and ds only started after the diagnosis of your ds then he needs to get help coming to terms with your son's diagnosis. I may be wrong but I am betting he has stuck his head in the sand regarding the whole diagnosis procedure and that he hasn't attended any courses with you or even read any books/ literature on autism?
I am so sorry that he has left you so alone to deal with all of this. His selfish behaviour really needs to stop. You need support and you need it now. If he isn't there to support you then there is no need for him to be there at all. You have enough on your plate!
Is your DH cagey with his phone? Is it possible he might have another woman? Which could explain the fact that he seems to have emotionally checked out of your relationship? I really hope that isn't the case OP!
Sending you strength, you can do this, you are the proud Mama bear of a beautiful little autistic boy! It sounds like you are doing a fantastic job with your little boy! You will cope fine with your ds and a newborn, make sure you have a sling/ baby carrier (connecta/ Tula/ moby wrap) and make up a box of sensory toys/ paper/ pencils/ puzzles and snacks that you can have beside you if you are trapped under a newborn breastfeeding, whatever will keep your ds occupied. My ds was content to sit next to me and play when I was feeding dd. He adored/s his sister and they have a lovely bond with each other. Having that bond helps ds so much! I am sure your ds will adore his new sibling too!