Is it normal to go from heavy metal to folk??!!

A couple of years ago I loved heavy metal, had loads of magazines, etc. Then one day I decided to get rid of all the magazines & now only subscribe because it's cheaper than buying it. I don't wear band shirts anymore (do they suit anyone??)

I've gone from the loudest stuff ever to the quietest. I used to get headaches all the time & snap at everyone, & though I still do the latter it's not half as bad as it used to be.

I think I might be depressed or something. is it normal for music tastes to change this drastically??