Is this a panic attack?

[ConfussedGal]

So im 16 years old and in grade 11.

Starting about a month ago every time in the hall way during breaks or lunch when im surrounded by hundreds of kids i get sweaty, dizzy, nervous, cold and hot flashes, nausea, and weak and shaky.
I asked some people and they think it is a panic attack .

So my question is, Is it a panic attack?
How do doctors diagnose this?