A year and a half ago I was doing a stressful job and I drank a lot of energy drinks (5hour energy drink three, sometimes even 4 times a day) to keep me going. That was during 3 months, then I abruptly stopped and developed anxiety, insomnia, OCD and eventually depression. For that I went to psychiatrist and he prescribed me an SSRI, known as Paxil. I was on it for almost a year and I stopped taking it 4 months ago.Everything was fine for 2 months, then I went to work on a cruisehip and couldn't fall asleep. Evetually insomnia started to interfere with my daily functioning, i was crabby and tense, and coudn't function properly so i quit that job. first i thought it was due to lack of exposure to sun and confined environment on cruisehip( rooms are very small, no windows, engine is somewhat loud) but my insomnia continued when i went home. now it has been 2 monhts already that i am unable to fall asleep; i took melatonine - it helps falling asleep but i still wake up in the middle of the night. i also tried yesterday with supplement called 5htp, which is used also as a sleep aid, but it gave me very vivid dreams, and i also woke up and couldn't fall asleep. I lost enthusiasm and motivation and feel a little bit depressed, could it be hormonal imbalance? i was thinking of continuing with 5htp, because it makes me feel a bit better, but i am worried about my sleep and if this is right for me anyway, because i've been on SSRI which is serotonine agonist, so I am not sure if i need any more seratonine. My psychiatrist prescribed me wellbutrine, dopamine agonist, for motivation but i am scared to take it since it can cause insomnia which is the problem in the first place. What do you think is the cause of insomnia?