Migraine Heachaches with Effexor and Ambien?

I have been on Effexor (300 mg) per day for about 3 years as well as Ambien which I take nightly.  Over the past several months I've had headaches on and off which I thought were sinus related.  I had sinus surgery and after the surgery continued the headaches.  AFter multiple consults with the ENT he has come to the conclusiong that I have no infection or blockage of the sinuses.  I am beginning to think the headaches were actually migraines and not sinus related at all.  My ENT ordered an MRI which showed white striping across the frontal lobes of the brain which he says is indicative of migraines.  I now wonder if the Effexor and/or Ambien has been causing migraines all along and I just misattributed it to sinus headaches.  The headaches are at the point now where I have them daily and the tripans do nothing to help.  My psychiatrist is reluctant to take me off Effexor but I have to get to the bottom of this because I am not functioning at work or home.  Has anyone had a similar experience?

[jcteachkc]

I have been too and after reading some information about migraines and sinus infections, I believe my symptoms are more migraine related as well.  I feel your pain.  Not sure what to do but ask to be taken off as well.