I HAVE BEEN EXPERIENCING MUSCLE SPASMS THROUGHOUT MY BODY ONLY

I HAVE BEEN EXPERIENCING MUSCLE SPASMS THROUGHOUT MY BODY ONLY WHILE SLEEPING. I FEEL MUSCLE SPASMS IN MY RIBS, LEGS AND BACK OF HEAD WHILE SLEEPING. I HAVE LOWER BACK PAIN EVERY MORNING AND EASES AS THE DAY GOES ON. SOMETIMES I WAKE UP WITH A HEADACHE. SOMETIMES I FEEL AN ELECTRIC SHOCK IN MY HEAD THAT LASTS SECONDS. MY JOINTS FEEL TIGHT EVEN AFTER I WAKE UP. SOMETIMES I WAKE UP WITH CLENCHED FISTS. CAN YOU PLEASE TELL ME WHAT THIS MIGHT BE.