I been taking Mirtazapine 15mg for 5 days I feel better now, I don't feel like I want to cry?I slept pretty good for last 2 days, but just last night i could not sleep at all. I took my regular 15mg does one 1hr before bed time, but i could not fall a sleep..I'm not sure if the pill stop working or if this is normal. I'm just worried that my insomnia will continue again.Does anyone has the answer for that..Is it normal.. would i sleep tonight..