Panic Attack, Please help?

okay so this is weird.... I think I am having a panic attack, but I dont know. It fells unreal. I am really dizzy, my hands are clammy, and my heart is racing, but I am not hyperventalating. I dont know if this is a panic attack or not. I do have panic attacks, just not sure about this one. In the past ones I hyperventalate. so what do you think