Your dh needs to understand that although he is working full-time, you are on call 24-hours a day with a small child. That works out at 168 hours a week as opposed to his 40 or so. Obviously you don't work every minute of those 168 hours, but you have to be available for all of them because your ds could wake or need you at any moment. This is on top of the responsibility for running the home, shopping, cooking and laundering for 3 people, and all the other housework and organisational tasks that go with it.
While he is working, he gets journey time to arrange his thoughts, and a lunch break to relax, meet friends, or attend to any personal matters. You don't have these luxuries. If you want to get your hair done, try on clothes, go to the gym or get a cervical smear you have to have someone mind your ds. The only time it lets up is when ds is asleep, and even then you are tied to the house. I expect you spend most of this time catching up on jobs you can't do when he's awake. If you do sit and watch tv etc it only reinforces the myth that that's what women do all day when in reality you should be able to snatch a break if you want, just like people with outside jobs do.
Your dh needs to understand that you need his help in order to remain the kind of woman he fell in love with in the first place. When you turn into a resentful, unfit, ungroomed, boring frump because you have no opportunity for personal time he will be asking why you have let yourself go! Explain that if he wants the fit and healthy, well-dressed, well-groomed, fulfilled, happy wife he fell in love with to exist in a few months time he will need to give you some personal time.
And as well as this, you need that bunch of flowers or take-away as a little boost to your feelings of worth. Small children are totally draining and are not capable of giving much back. We take what little 'job satisfaction' we can in motherhood when our children are cute and affectionate to us but would that suffice in any other job? I think not! Let alone one with no pay.
I think as well as help from dh you need regular babysitting so that the two of you can have child-free time together and possibly a few hours a week with a childminder so that you can do personal stuff like shop for clothes or get your hair done.
Remind your dh that you are not a member of staff, you are his wife and that parenting is a shared job, whether he is the main breadwinner or not.