Dry itchy scalp

I have a scal problem.  Since the beginning of summer my scalp has started itching.  At the beginning I did not have any flaking or scaling, just a red irritate scalp that itches.  My Dr. prescripted derma-smooth which seemed to help for awhile.  However hard to put on during the day and then go to work.

I tried Selsun Blue shampoo and that made it worse.  My scalp starting to have little white flakes around the folicle and still itching.  I also felt like my scalp was throbbing and tingling.

So stopped using that right away.  I went on the try the vinegar and water treatment and the olive oil/vitamin e treatment.  That definitely helps but again to impratical to apply and go to work.  The itching seems to be concentrated in one area of the scalp.  I can't get in to see a dermatologist for another month.  Any suggestions would be greatly appreciated.