Brain filters all the positive evidences

Hello Coaches,

I have a lot of self-doubt going on. Though I try my level best to show up and do stuff against all the fear/what ifs, my brain still thinks I can’t handle situations. For example, I wanted to give a presentation and I had lot of anxiety about how I am going to present but I still went ahead and did it fairly well. Then when I have to give presentation again my brain starts the same thought loop again: What if this time you screw up? What if this time you can’t handle? I kinda get exhausted to deal with the same type of thoughts again and again. My brain doesn’t consider the fact that I have handled these situations well and I can do this again. It’s like I don’t trust my abilities and always doubt my capabilities. How do I transition these self-doubts to self-confidence?