Thanks for sending your query to us.
A tumour or other space occupying lesions have other sign and symptoms also.
Since you have been examined by the doctors and they did not come across such pointing evidence to investigate on those lines.
Since you have these headaches
for 2 years now ,tumour etc. would not remain static for so long and would progress to shoe signs and symptoms like nausea
which has not happened in your case.
Alternative medicine people have their own way of dealing with these problems which
is different from our approach.
You should take care of yourself ,what is called as life style management,have proper rest,balanced diet and exercise including yoga
will help you.
please do get back to me in case of any further query in this regard.