sometimes after a long night of using cocaine i get headaches and sometimes even slightly blurry vision. one time it even looked like the lights on my clock were moving around, know i have no intention of stoping, i dopnt use all that much, i jsut wanna know what these symtoms are and if there a sign of overdose, so please dont reply giving me help centers and ways to quit. it wont help me at all. thank you for your time