For the sake of your small son, try and settle things down. You must have known he could get awkward over wee things before marriage, so why the surprise now?
Look at the options of you working, if that's what he would prefer you do. Check out childcare and costings, availability of work and costings eg business clothes, travel. Then sit down and go over the options in as calm a way as possible. I'm assuming there is a drop in money coming in thus the niggles about work.
On the other hand if you can't see a way forward, don't immediately run back to mum but try and talk things over with husband with no shouting or angry words from you.