I am trying to stay positive

I thought raising my son by myself would be easy but I was wrong , now that I’m in school I can’t concentrate and I want to sleep more because I don’t get enough sleep everyday it’s the same routine , I wish I had help where I could just have time to myself and go for a walk more . When my son is in daycare I’m class and I’m just so focused on everything . His dad is in jail and gets out in 3 weeks I’m so nervous because I don’t want to go to a shelter also because they said I would need to give up my apartment like no! . I just know I gotta be watching myself and call the police if he bothers me. God I’m so tired idk what to do with my life and I’m trying so hard