Just curious OP have are you currently working or have you worked in the past? It seems like your currently just getting depressed due to rumination and overthinking, possibly caused by a lack of structure due to no longer being in school. I'd recommend getting a job, anything really, so that you have a schedule to build your day around. All problems can be handled with time but it takes time to fix those problems so for now just take breather and work to occupy yourself and prevent the constant rumination.