Hello. For the past 12 days I've been experiencing a headache in the back of my head. It's never severe, but nagging. It's not there all the time, it comes and goes. A good night's sleep and it's fine until a few hours later. I went to the Dr. for shortness of breath 1/23/07 and was told I had a nodule on my lung. Igot a CT scan on 1/24/07. It was neg. for cancer. Now, it could be heart related. OK, I started having these headaches the 24th. Could it be the stress of worrying about test results? The headache feels like pins and needles. It's just in back of my head and like I said, not severe. Anyone experience this kind of headache? Thanks, Ray