hate being a mother

When does it get easier? My son is almost 10 weeks. He has reflux and bad gas. I feel like I spend my entire day trying to get him to stop crying. I want to get a job just so I have an excuse to leave this house and do something other than bounce this baby all day to get him to stop crying. 
Plus, he won't sleep at night unless I sleep on the couch and he sleeps on me. It's killing my back. I can't keep doing this