Remaining cool under pressure can be wonderful. At the same time, your unruffled nature could also be mistaken as nonchalance or a lack of interest.
Don’t assume that the other people know that you are taking the situation seriously. Communicate about how you are approaching the problem — even if you don’t outwardly show that you’re sweating it.
You might also share your tactics for staying so calm, whether it’s overpreparing, changing your mindset, repeating positive affirmations, or biting off small chunks of big tasks. This will help them understand you better. (They may also learn some powerful stress-alleviation techniques.)
Lastly, don’t underestimate the power of empathy. Asking a simple question like, “What can I do to help?” demonstrates that you recognize the stressful situation and shows that you care.