I recommend you read about and learn how to practice self-compassion. Think about yourself and talk to yourself as you would to your most loved person, as you would want a supportive loved one to speak to you. The first one on this list helped me immensely when I was going through a similar crisis.
https://positivepsychology.com/self-compassion-books/
Also, download an app and do guided meditations every single day - on self-compassion, self-love, loving kindness, hopefulness, positive thinking, anything else that you feel you need help with.
Reframe how you view yourself and your life. These are things you can do in addition to, in lieu of, or until you find a good therapist. Best of luck.