Chronic headache not responding to usual medication , presence of GI System symptoms , feeling unusaual sensation in throat .... all suggests that you may have somatoform/somatization disorder . you may be experiencing or have experienced any significant stressful events in your life. dont worry it is quite managable. kindly consult nearest psychiatrist
. by CBT and anti depressent drugs you may feel better. i wish u should improve at earliest possible.