In addition to Ann's question....Are you taking preventatives?
If you are not...and you just continue to take Tylenol 3, you are in rebound...you need to STOP taking the Tylenol 3 as you mentioned and see a DR.
They can begin you on a preventative to control the number of headaches you have!
Basically without doing so you are like a hampster on the wheel...just running the cycle!
Let us know if you have any questions!