I will never sleep again 😩

My 2 mo old is so colicky. He has literally been crying all day.  Nothing and I mean NOTHING calms him down... I have tried EVERYTHING. He is only comfortable in my arms so I never get decent sleep.. I have 4 yr old who won't fall asleep until midnight every night, my SO doesn't help me at all. My house is a huge disaster and my SO just adds to it. I start work again full time next week and I'm absolutely TERRIFIED. I'm in tears writing this, just had to vent