I've not experienced anything like this - Althought it does hurt to lay on my head sometimes in that area. Glad to hear you are getting a ct scan. How soon will that be?

Did the techs who did the cardiac angiogram say anything about this being a possible side affect? In April I went for a cerebral angiogram and had clot develope outside the femoral artery. The docs office aired on the side of caution and got me in asap. Thankfully, they were able to tell me it was a side affect that would dissolve over time and it has.

I hope you find out what's going on.