Hello Dr. I Am 23 Years Of Age, 1.8m Tall

Hello Dr. I am 23 years of age, 1.8m tall and weigh about 70kg. I have been having experiencing a neck stiffness with a crackling sound every time I turn my neck and it goes down to my shoulders, terrible headache and a back pain for almost 6-7yrs now. I Google the symptoms which lead me to meningitis, but when I went to a hospital then the doctor told me it's not and then again I went to a private doctor and he also told me that it's not but yet they don't know what is it. Can you please help..thanks in advance.