Oh man this is so similar to what I do. Especially in the mornings I tell myself to get out of bed and I physically cannot move. I think the major turning point for me was realizing that I hated being "sick" because I sat around before and wrote super sad poems and romanticized it before I was like "I... I don't want to be sick anymore" and really accepted that I was depressed and needed to go and do things if I ever wanted to get back on track and so began the bedroom parkour. I would roll out of bed and reward myself. And then get off the floor and reward myself. And move to the table and so on and so forth. It was slow progress haha but it was progress. Sorry now I'm babbling. I hope this helps in some sort of way!