Emotionally unstable

I quite cold turkey about a month ago maybe? 15mg (I was taking half the pill later on) It took 3 weeks for the physical symptoms to calm down Neasia, heart palpitations, brain feels like it's buzzing, loss of appetite, weight loss, severe headaches, dizziness. Now I have restless legs and I cannot stop crying for the life of me. I was never this sensitive before mirtazapine, is this normal? How long would it last? I was on flouxetine 20mg and mirtazapine 15 mg for about 3 years till I decided I didn't want them anymore, because I felt like it slowly stopped working.