headache

I’ve had a headache off and on for the past three weeks.  I’ve had enough Tylenol to kill a horse.  It’s been down to 1 out of 10 since yesterday.  It’s ramped up to about a 6 some days.  It really would be nice to get rid of this.  Causes?  Stress, the accident with the Soul (whiplash), caffeine withdrawal, something I ate or drank … hard to say.