as mav said prolactin can cause issues it did for me, first cycle (before I knew better) I ran deca300 by itself I used to work myself into a sweaty mess hitting it like i just got paroled on 20 years...sometimes i could blow but othertimes i would feel it coming and get soft talk about wanting to shoot yourself in the head (no pun intended)
Yes like Mava said on the prolactin issues. Fina will do it too. And yes, like Halfcenturion said, proviron will definately help. Makes me too sensitive almost.