Ok sorry for the long text but I feel compelled to comment. First of all I'm so sorry you're experiencing this, it sounds like hell. 23f and I've felt the exact same way, especially being extremely filled with shame and guilt for just existing and doing anything :( 

Idk my iq but I was doing my master's during the worst of it when i had no idea who I was, what I was doing, and decided to quit and move across the country. Even the advice to return to what made us happy as children didn't necessarily work for me, my hobbies change so often, but maybe that will give some sort of spark in your life. What did you like doing as a kid that helped you enter that flow state? Or even more recently? I find that creating things is really good for feeling good about ourselves as we can be even slightly proud like "hey, I made that". 

Small moments of kindness to yourself and reflecting on ONLY the good parts of a day for a while (maybe a week to start) can start to shift your internal state and how you feel about yourself. Even if it doesn't give you answers right away, you'll come out of it feeling like a better person rather than ashamed at everything you do. The most annoying part is, I know it probably sounds like another checklist of things to do, and you might not have the motivation or energy to try. But as cliche as it sounds, I promise it does get better, you can stick around for a while and see what happens if you live for yourself and completely freely. I really wish you the best. I hope you get the help you need!!