Head pressure. Sleep ( almost similiar).

WHEN I SLEEP SIDEWISE WITH BOTH HANDS UNDER MY HEAD AFTER WOKEN UP IN MIDDLE OF SLEEP CYCLE ITS FEELS LIKE I HAVE NUMBNESS IN MY BOTH HAND FOR 1 MIN AND HEAD ALSO (SPECIALLY SIDE OR TEMPORAL) FEEL LIGHT HEADED( NUMB) FEELING LIKE , its felt like blood has been stopped going in brain(eg i slept in left side  so its feel light headed  after woken up and right side feel normal) AND ITS GIVE ME HEADACHE SPECIALLY PRESSURISED( TYPE)  ONCE AFTERWARDS ( HEADCHE GOES AWAY AFTER 12h approx) This only happens when i does not  use pillow if i used it then case is normal... AND I ALSO FEEL PAIN IN MY SHOULDER, ARM AND IN LEFT SIDE OF BRAIN FOR FEW SECONDS WHEN I LEAN SIDEWISE( left ones)  ALSO FELT DIZINESS SIMULTANEOUSLY( when using my phone) I am worried that is my nerve pinched or compressed.. I had pinned images how i sleep( almost similiar)...