The word "panic" can function both as a noun and a verb.
As a noun: "Panic" refers to a sudden, intense feeling of fear or anxiety, often accompanied by a sense of being out of control.
As a verb: "To panic" means to experience or be overcome by sudden fear or anxiety, often leading to irrational or frantic behavior.
Regarding the correct statement, the more appropriate phrasing would be "don't feel panic." In this context, "panic" is used as a noun, referring to the state of experiencing intense fear or anxiety. So, the correct sentence is: "Don't feel panic." This means, don't allow yourself to be overwhelmed by feelings of panic.
On the other hand, "don't be panic" is not a grammatically correct construction, and it doesn't convey the intended meaning. "Be" is not the correct auxiliary verb to use with "panic" in this context. If you want to use "be," you could say something like "don't be panicked," which means "don't be in a state of panic." But for the specific phrase you provided, "don't feel panic" is the correct choice.