Here are some examples of how you could use a similar concept in a sentence:
* "Despite his initial anxiety about the massive crowd, the musician was able to give a fantastic performance."
* "She struggled with overwhelm when faced with the overwhelming number of choices at the buffet."
* "His fear of speaking in front of large groups made it difficult for him to present his ideas."
It's essential to avoid using "polyphobia" in formal contexts as it is not a recognized phobia.