Sort out the maintenance thing. It's for your kid, not for you and your husband, and to be frank it's none of his business.
That will also give you a bit of leeway when you decide to leave your husband should you do so.
about the maintenance, you are right but the fighting is weighing me down. the ex has nothing else to do than to fight me. he has already sent me his income and expenses and from how he has structured it, its clear he is not planning to pay. going to the court to be awarded R500, doesn't seem to be worth it. I guess i am just tired, so tired and this whole thing with my husband is not helping. one fight at a time is one thing but this now is on another level.
I have been trying to convince myself to focus on myself, my child and my job. but its not easy. especially with this headache that doesn't want to go away.