When i have a panic attack, i get a rush of warmth (almost hot) through my testicles and everywhere else. is this normal?

Regular panic: An occasional panic attack need not > concern, but regular ones do and any sensations they bring are calls for action. This may be a common or rare one - but it does grab your attention, right? Yes, the additional blood flow and hormones of stress can give this sensation. Don't worry, but find a good therapist. Let them refer for Rx if needed. Learn ways to deal w/ the anxiety/panic. Best!