Heaviness in back of head. My fears go.

Hi doctor, I am having head aches from many years.. I have used ayurveda and it decreased for few months. Then again i got head aches..again i used ayurveda and it didnt come for few mnths.. now from last few days..around a week.. i am having head ache in the back of head(left side) and behind left ear. I am feeling heaviness in back of head..sometimes i feel it when i bend down...i am also having pain in left eye.. i have got my eyesight checked and there is no power changed. I use laptop alot and mobile. When i use dart tablet my head ache goes..but the pain to the back of head is still staying. I am not getting good sleep from a year..sleeping only 5 to 6 hours..that too disturbed sleep.. I worry alot.. I dont know if i am having any issues.. i m worried abt it when i read in google.. :-( kindly advice and let me know ..you comment can give me strenght and let my fears go.. thanks in advance doctor.