My head, it hurts, so bad........ any suggestions?

recently when ever do exercise, run, or do anything that would get u a bit out of breath (including ) i get this pain in the back left of my neck. it quickly moves upwards to about where you can feel that lump at the bach of your head still staying to the left, its so painfull, it then starts to well what i would explain as a throbbing pain, my whole body freezes, i can not move, the pain is unreal, but quickly fades.... and i just get an average headache, lasting upto 36 hours so far! but the throbbing will still be there but very faint this compleatly goes around the same time as the headache. its happend 3 tims in the last week now! i have taken lots of paracetamol / asprin, which helps the headache but not the throbbing? i have made an appointment in my doctors but that is not untill the 28th may...... anything that may help? what could it be??