Agoraphobia literally means "fear of crowds" but being irritated by them doesn't necessarily have a name--though I would assume it has some relation to agoraphobia.
another word for being irritated is being annoyed
The definition of the word 'annoyance' is the feeling of being irritated. Some synonyms for this word would be anger, irritation, unhappiness, and frustration.
Yes, in the sense of being an emotional condition, often called a "feeling."
Claustrophobia is the fear of tight spaces. Agoraphobia is the fear of being in crowds. The root word agora actually comes from the Greek for "market place."
That feeling is called "alienation".
fear of being around crowds
Being easily irritated or annoyed can be a sign of a disease. It could be that you are depressed or could be a symptom of a problem with your thyroid.
its illusionary feeling
euphoria: a feeling of happiness, confidence, or well-being sometimes exaggerated in pathological states as mania.
Flexiblity
Miss Scatcherd is likely feeling irritated and frustrated. She is a strict and disciplinarian character who is often portrayed as being critical and harsh towards her students, such as Jane Eyre. In this scene, she may be showing her displeasure towards Jane's behavior or actions.
No hiccups are simply your diaphragm being irritated.