I'm on my second treatment with ep. Over the last week I've developed a pressure like headache mainly on the sides of my head but it can go all the way around some times. It doesn't really hurt, but is very annoying. The pressure seems worse when driving. I was on Hydrocodone for pain of ep. for a few weeks and stopped taking it around the time the headache started. I was just checked out at the ER with head CT and blood tests, all normal. My urine test for epididymitis a few days ago was negative. What the heck is going on? Nothing helps the headache/pressure, even the shot the ER gave me.