Yeah, I have had headaches last that long. I hope it's nothing to worry about cos I'm a bit of a hypochondriac
I had headaches/migraines when I was drinking which felt like my head was clamped in a vice. They lasted for months. My doctors weren't concerned enough to do any tests. When I finally figured out they were migraines I stopped getting them so a huge part of it must have been psychological. The headaches I get now are childsplay and I love them. Little tension headaches that last for ages and come and go but really are no problem.
I think having headaches while we are quitting is normal. I was beset by them in the second and third month. They got much better after that though.
I'd still mention it to your doctor though if you're concerned x