Explorer Thor Heyerdahl wrote that he used to worry about the deep ocean until he realised that the ocean wasn’t there for him to sink into: it was there to keep him afloat.
Like him, my natural tendency is to default to panic mode and to tense up, assuming that the worst is going to happen, which is a self-fulfilling worry if I’m writing or drawing as I’m not going to do my best work if I’m tense. Like Heyerdahl, I’ve just got to develop a relaxed but unshakeable conviction that I’m going to stay afloat.