I fell straight onto the back of my head yesterday and through the night my neck started to gradually hurt more now my whole neck hurts, do i see a dr?

Neck strain: It's not urgent to see a doctor if this is your only symptom. Treat with Ibuprofen or Aleve (naproxen) and ice. Its typical for muscle pain like this beginning the day after an injury . If symptoms worsen see your doctor who might refer you to physical therapy and maybe get an xray. Going to an inexpensive chiropractor for only a few times could also give some relief.