iPhone 6 Plus headache and migraine

Been buying new iPhones every year since they have been released.. Received my new iPhone 6 plus last Friday the 19th on launch date and was super excited!

After owning the phone for a day, I started to notice that I have a really bad headache. Been using it for 12 days now and the headache has not gone away... The only difference that I can tell from this phone and my previous 5s is that this thing has NFC built into it with NO option to turn it off. I believe this is what is causing my headaches. I really love this phone but I'm obviously not going to jeopardize my health for screen size unless Apple adds a kill switch to this antenna.

A little background - I am very sensitive to Bluetooth. Any time I am around or using it, I get these headaches exactly what I am describing here. First thing I always do when I get my phones is shut off Bluetooth and everything has always been ok.

Has anyone else experienced a similar health concern?