Hi mam
First of all, as parents, you both should be at ease and relax in order to help your kid.
I think, it can be side effects of adenoid issue and its respective medications(along with antihistamine).
Adenoid hypertrophy often seen as complications of persistent middle ear effusion that causes to hear like bell sounds or sleep disorders like apnea that causes chest discomfort during day time.
This adenoid hypertrophy places the patients at sleep disorder (apnea) and slowly develops behavioral problems. This causes mild to moderate pulmonary tension causing chest discomfort. This finally leads to child depression and attention deficit hyperactivity in children.
The depression state of the child sub consciously observes and tries to perceive present environmental situations or her basic fears of insects, lizards, snake or she might have fear of caretakers(parents) getting hurt or diseased.
I suggest you to see an ent specialist to rule out adenoid issue at present and get the clear reports.
Then visit a psychiatrist with the reports and consult all the issues. You will get the right treatment and solution soon. All the best.
Next Steps
Visit ent specialist and get a clear cut report about adenoid issue.
Then visit a psychiatrist for further treatment
Health Tips
how ever also you must show to a psychiatrist.
observe that how she sleeps at night times
observe does she have any breathing or snoring issues during sleep
take her out side and let her play and be happy which might deviate her from depression or fear