I Have Adhd, Anxiety and Depression

I think have. I can't do my work properly, forgets things and always makes mistake. My manager thinks I'm stupid. Now I began to think I'm really stupid. I accidentally cancelled wrong bus ticket to home. I booked again and it turns out I booked the wrong one. I have social anxiety too. I always thinks that other people don't like and lesser of me. I can't even talk properly to people. So I'm a kind of loner. I really need help.