Maternity Belts?

So I'm 20 weeks and I've had pain and discomfort for basically the whole of my pregnancy and I know its only going to get worse 🙄

Towards the end of my day at work, my back aches, I'm sore in my lower stomach and when I walk my stomach hurts.

Do maternity belts work? What are they specifically for? Would anyone recommend them or a certain brand? Or even anything else for this discomfort?

Thanks 😊