Dreams involving emergencies, health crises, and feelings of helplessness can often reflect underlying anxieties or worries in your waking life. Here are some interpretations to consider:

1. Concern for Others: Your dream involves you trying to help your cousin and a stranger in distress, which may point to your nurturing instincts or a sense of responsibility towards others. It could indicate that you are feeling overwhelmed by the needs of those around you.
2. Communication Issues: The repeated failure to call for help—like not being able to reach 911 or getting an unexpected call from your mom—might symbolize feelings of frustration or helplessness when trying to communicate your needs or seek support. This could suggest that you feel unsupported in a situation in your waking life.
3. Anxiety and Panic: The themes of allergies and anaphylactic shock can represent feelings of being overwhelmed or being in a situation that feels dangerous or out of control. This may suggest that you are facing stress or anxiety that feels all-consuming.
4. Fear of Loss of Control: The presence of a person tracing you and the inability to reach emergency services could symbolize a fear of being pursued by something in your life that you can't escape, whether that be responsibilities, personal issues, or external pressures.
5. Family Dynamics: Your mother's involvement in the dream may indicate a connection to your family dynamics and how they impact your sense of security. You might want to reflect on how you feel about your mother's role in your life and any underlying issues that may need addressing.

In summary, this dream seems to be a manifestation of anxiety and concern for those around you, alongside feelings of helplessness and frustration. It may be helpful to take some time to reflect on your current life situation, identify any stressors, and consider ways to seek support or communicate more effectively with those you care about.