I feel for you, i really do. I know exactly what your going through ! Im 25 now and I've suffered with anxiety & panic attacks for 4 years but im at last starting to learn my self how to control it. I know it is so very hard to overcome. The things you say you do to calm your self down like keep moving around, moving arms and legs ect, will only make more difficult to get rid of that horrid feeling, that tingling vibrating feeling all over or that were about to collapse or faint or worse !! When we have a panic attack, we start to breathe rapidly which is a natural reaction to panic but this is what causes that tingling feeling, the light headedness and dizziness. Because we start to breathe quickly, were not getting enough oxygen in our bodys, thus the body will start to react to lack of oxygen, thats the tingling & light headed feeling you get during an attack !! The key is to try and take slow & deep breaths and and tell yourself that this is just another attack which you have got YOURSELF over plenty of times. Dont keep moving around because this will just make your body need more oxygen due to muscles contracting, which you will not be getting due to breathing rapidly & will only make you feel a whole lot worse & make you panic more ! I know its easier said than done, as i've said this to my doctor numerous of times but i now know that slow and deep breaths do actually work wonders when having a panic attack. No, im not a proffessional on panic attacks but im speaking from personal experience. I hope this can help you in some way