"I can’t trust my brain"

C-I have a brain
T-I can’t trust my brain
A-question all my thoughts and feelings
R-not trust my brain

Not sure where to go from here. I find myself spinning in my head. Trying to allow the distrust feeling, but ultimately I’m also thinking “This is holding me back from excitedly pursuing my dreams!” and then I feel a little panicky. Wondering if I’m not ready to change these thoughts as attempting to question them/poke holes in them isn’t “working” yet (I’m still feeling distrust), and I know I tend to resist feelings, so perhaps need to sit with feeling? Thank you for your thoughts on this!