very upset, worked-up:
gladdened,
calm,
untroubled,
unconcerned,
happy,
sane,
pleased,
unworried,
reasonable,
composed,
balanced,
cool,
peaceful,
collected,
sound.
noun:
unperturbed,
serene,
unagitated,
peaceful,
cool,
untroubled,
self-collected,
undisturbed,
placid,
unshaken,
coolheaded,
collected,
self-possessed,
unworried,
tranquil,
calm,
composed,
self-composed.