Trazodone Hydrochloride and light headed

hey...i take 50mg of trazodone...i am only 15 and it makes me feel tired but doesnt knock me out until i lay down...a couple nights ago i took it at 12 and i was still up till 4 but i was extremly tired and had to go to the bathroom...so i stood up from my bed and felt my self get extremely light... i started 2 walk and i know my door was shut but i woke up on the floor and the door was open...i am gettin very light headed during the day and i kant eat...but i also take 15mg aderol...wut should i do? i dont want to take either of the pills...