Worried

/ˈwʌrɪd/

anxious or troubled about actual or potential problems: "Michelle knew that her friends were very worried about her"

Anxious
/ˈæŋk.ʃəs/ feeling or showing worry, nervousness, or unease about something...

Fearful
/ˈfɪəf(ʊ)l/ Feeling or showing fear or anxiety. "they are fearful of the...

Emotions Wheel
I have enjoyed working with the emotions I found in Plutchik, but there are so many more...