Flonase and poor man

horrible headaches, about three to four a week that don't really respond to excedrin or Tylenol. also insomnia! never had any problem falling off to sleep and now it's extremely difficult to fall asleep and stay that way. the only thing that has changed in my routine is flonase. beginning to suspect flonase is the cause and will stop taking it. every time i start back up on it again i go through this cycle again (this is the 2nd cycle). started back in October after visit to ent for chronic congestion. the congestion was bad, but at least i could go with out horrible blinding headaches and could sleep, that poor man's medicine.