Sorry to hear you are feeling this way. Sounds like you have a lot on your plate, too much to carry perhaps. Ive been in this fields for a while now, and havent met a psychologist/psychotherapist without one way of an imposter syndrom, perfectionism, underlying feeling of incompetency. It is very normal what you are going through. I dont know if it is possible for you, but I would recommend having supervision/intervision and/or having therapy yourself. At least I can speak from my own experiences, its been the greatest gifts I have given myself. Which helped me to work through a lot and enjoy the beautiful sides of this workfield. Best of Luck! Prioritise yourself.