I suspect I have a cervicogenic headache?

Dear doctor,
I suspect I get a cervicogenic headache. Here are some symptoms:
1) headache around a circle region above ear
2) bad sleep quality
3) poor memory
4) great pain around neck and back

How could I confirm if this is a cervicogenic headache?
I have been suffering such headache for a month. I really need your help. Thanks in advance.

best regards,

General Information: I want to know something about it before going to a doctor. so that I can describe the symptoms accurately enough.