Freaking out on client requests

Thank you for your response to my first question on the topic. I should have mentioned however that I am not a coach, but a lawyer. Hence, I don’t believe that the solutions to my clients’ problems must exist in them and not in me. They are obviously looking to me to provide advice based on the law which they don’t know. And sometimes I doubt that I provide them with the best response and strategy. How can I overcome those doubts about my capacities?