Sadness/Fear/Anxiousness

apprehensive

viewing the future with anxiey

concerned

troubled, worried

despairing

desperate, a loss of all hope (hopeless)

disappointed

dissatisfied, upset

maudlinl

foolishly or tearfully sentimental

melancholy

sad, depressed

morose

sullen, withdrawn

mournful

sorrowful, grief-stricken

remorseful

apologetic, regretful

resigned

having accepted something unpleasant that one cannot do anything about

somber

 oppressively solemn or sober in mood; grave, serious

ominous

suggesting something menacing is going to happen in the future; threatening

pessimistic

expecting the worst possible outcome

wistful

having slightly sad thoughts about something that made you happy in the past