How do you get through the day?

My baby boy is 3 days old. Born at 32 weeks exactly. 3 lbs 5 oz. staying in the NICU for the foreseeable future. The thought of being discharged in 2 days is killing me. Just sitting in this hospital room is killing me. I know I can see him whenever I want after we are home but being away from him at all seems impossible. Please give me your advice😓😭