Oversensitivity
Nervousness
noun, な adjective
You've surpassed what is normal alertness. You are too alert. You notice everything. This is oversensitivity.
This is a jukugo word that uses the on'yomi readings of the kanji. You should be able to read this on your own.
過敏性大腸症候群に苦しんでいます。
I’m suffering from irritable colon syndrome.