Yes, her mood could be in response to her father canceling is time with her. If she is reacting to something that most people would react to, like a disappointment, then most likely she is having a normal reaction to the situation.
If she is saying she feels fearful and there is no direct reason for her to feel this way, then she may either feel sensitive to the situation, or she can be developing fears. If it seems that fear is taking over her life and she is unable to function because of it, that can indicate a more serious problem. But if she just expresses fear in certain situations, she may just feel upset about her situation and that is probably a normal reaction.
Here are the symptoms of childhood Bipolar (since childhood Bipolar symptoms have not been established yet, these are based on the research there has been and adult symptoms of Bipolar) from Psychcentral.com. They may seem similar to normal childhood reactions so you may have to keep an eye on your daughter just to see if the reaction solves itself or may need further evaluation.
Because the current diagnostic manual of mental disorders doesn't recognize
childhood bipolar disorder, there is no official symptom criteria. However,
researchers have used criteria similar to that of adult bipolar disorder,
requiring a child or teen to meet at least four or more of the following:
- an expansive or irritable mood
- extreme sadness or lack of interest in play
- rapidly changing moods lasting a few hours to a few days
- explosive, lengthy, and often destructive rages
- separation anxiety
- defiance of authority
- hyperactivity, agitation, and distractibility
- sleeping little or, alternatively, sleeping too much
- bed wetting and night terrors
- strong and frequent cravings, often for carbohydrates and sweets
- excessive involvement in multiple projects and activities
- impaired judgment, impulsivity, racing thoughts, and pressure to keep
- dare-devil behaviors (such as jumping out of moving cars or off roofs)
- inappropriate or precocious sexual behavior
- grandiose belief in own abilities that defy the laws of logic (ability to
fly, for example)
Keep in mind that many of these behaviors, in and of themselves, are not
indicative of a possible disorder and are characteristic of normal childhood
development. For instance, separation anxiety, by itself, is a normal fear of
being separated from one or both of the parents (for instance, attending the
first day of first grade or if the parents want to go out for a night).