Pain in scalp, excessive hairfall.

I have had hair-fall for last 11 years. It suddenly stops and aggravates suddenly. My hair thickness will come down to half of it every time. Moving to Gurgaon from Delhi in 2016 and shifting to Chennai for 4 months(where i also worked in extreme conditions and literally all my hair fell out)  also changed the texture, quality of scalp. The scalp is dry and also oily. Some dermatologists have suggested to stop using oil while some suggested oils. I have very little hair left AND IT FALLS OFF EASILY (combing, washing or oiling) and MY SCALP HAS PERMANENTLY BEEN IN PAIN MOSTLY ON THE TOP-BACK SIDE OF THE HEAD LATELY. I also have a history of being on anti depressants in 2016 and I suffer from anxiety. Sleep patterns are also disturbed.