>>311651532
Doing these will unironically unfuck your shit.
They're psychiatric therapy grade metacognitive therapy worksheets. Go through them for free. This is the stuff a proper psychologist will go through with you as part of your therapy to fix this stuff. 
https://www.cci.health.wa.gov.au/Resources/Looking-After-Yourself/Social-Anxiety
https://www.cci.health.wa.gov.au/Resources/Looking-After-Yourself/Anxiety
https://www.cci.health.wa.gov.au/Resources/Looking-After-Yourself/Depression
https://www.cci.health.wa.gov.au/Resources/Looking-After-Yourself/Assertiveness
https://www.cci.health.wa.gov.au/Resources/Looking-After-Yourself/Appearance-Concerns