First off, don't quit your job. Your job provides a routine for you to follow. Otherwise, you could begin to slip even further down the hole. Next, you mention

First off, don't quit your job. Your job provides a routine for you to follow. Otherwise, you could begin to slip even further down the hole. Next, you mentioned PTSD from sexual assault. This isn't burnout. You need professional psychiatric help. Please get it ASAP and stop reading random internet comments (like this one). But if you can't find an appointment for a few weeks/months, some of the symptoms might be fixed with a multivitamin (OneADay or a generic equivalent - it doesn't push too far above 100% FDA daily value except for B12 and D, which are actually beneficial sometimes in higher doses).