When I read your post I thought about the effects of imposter syndrome.
You could be afraid of failure or feeling like you aren’t “good” enough.
I have also dealt with feeling like once I succeed then death or doom would follow. So instead I was afraid to put forth my full potential.
If you try to pinpoint as best you can, as to why you may be feeling scared, maybe you can accept those fears, understand how/when they were birthed, then learn to move forward with them. Look at them as motivation instead of obstacles.
Your fears coexisting with all your great attributes. Bring those great attributes to the forefront. Positive self-talk and self-encouragement. It may not be the most perfect coping strategy but hopefully it can help you overcome the stagnation or procrastination more often.
I wish you the best at figuring out how to cope with your fears.