Since September ive been in deep stress and depressed most of the time,i hate the light and prefer it in the dark with a candle on or something for a relaxing atmosphere,my mind plays games with me and makes me sad and stressed over the smallest reason,i feel like im not in control of my thoughts etc, i cant say ive had a brilliant past but i dont know if everything is backfalling on me, or is this a stage of puberty and teenage days im 15 aswell,some days will be good and some days will be bad i dont know what to do.im thinking of joining the gym and pumpin weights etc but i dont know to tell you the truth what can my next step be please help