Need Advice 😩

My baby is 8 months old today and still doesn’t sleep through the night. He wakes up every 2-4 hours to feed and be changed so I barely get any sleep at all because I have to take care of the baby by myself and then once he’s asleep I have to go pump. (I exclusively pump and feed it to him in a bottle) My fiancé won’t help at all since he works long shifts so he feels he’s exempt from helping... I don’t know what to do, but I feel so horrible all the time and extremely exhausted. I’m starting to have sleep paralysis and awful, vivid nightmares and can barely stay awake during the day. I start college here soon, and my baby will be in daycare while I’m in class, but I’m so worried I won’t be able to do it since I don’t have any help. I have severe postpartum depression and anxiety, I’m beyond stressed out to say the least.. Does anyone have any tips on what to do??