so im really really worried. Im 17 and since November i've had issues. My heart feel like it skips a beat on occasions, when i get cold usually only my left side of my body gets the chills, my left leg and arm get numb and tingly, i get lightheaded, and it gets hard to breath and move. I pop my neck alot, usually i push until it pops. I don't know if its my heart or nerve damage or wat. I've been to the school nurse and she's taken my pulse and blood pressure and it was all fine, so idk what to do. Im healthy, i do smoke weed though, but sometimes i stop for a month. I wonder sometimes if its withdrawl symptoms i feel. I just need someone to help me figure this out:'(