4 month sleep regression

How is everyone is coping and what have you been doing to try and keep your baby into a routine as much as possible? This our 3rd night on the sofa with hardly no sleep as lo is up a lot. He will start of in his cot from 9:30/10 until around 12/1, after that he will not settle in the cot at all and will only sleep in my arms but is still up ever hour. I want to try and keep everything as normal as I can but I can’t leave him loaning in the cot as I hate hearing him and it’s keeping the husband up. One tired mummy here