I've been taken mirtazapine 15mg for almost 3 weeks and was wondering why it isn't helping me sleep since taken them from my doctor he said it will help me sleep but its not working for me and was wondering if anyone could tell me why its just seems like when I am taken them on a night time i feel more restless and feeling really low worse before i was taken them and it seems to me that its not working on me and feeling even more emotionally where i am always crying on the slightest thing could anyone tell me why I would appreciate it if you can give me any advice. Thanks