Sleep regression

I feel so depressed… my son is goinf through the sleep regression and it sucks. My husband and I are working in the morning . It’s so hard to stay up and make him sleep the whole night. We are zombies at work already. I think it’s been 2 weeks. Mums, will the child’s sleep be back to normal as before? Or no? What do I have to do for us to get some sleep? I don’t know how to sleep train