Symptoms after a 4 week taper off 7.5mg of Mirtazapine

Symptoms since stopping 2.75mg of Mirtazapine over the last 145 days. 1: Widespread electric shocks from my torso to my feet. 2: Involuntary movements in my GI tract , legs, feet and toes which worsen when I lye in bed . 3: Generalised Tingling sensations. 4: Extremely rigid abdominal wall which worsen later in the day. 5: A feeling of pulling in my chest. 6: Feel extremely heavy on walking. 8: These symptoms can vary in intensity day to day and there is no let up from the moment I waken until I fall asleep and if I waken in the night these symptoms come straight back. They can be excruciating painful at time and just painful at other times. This is not all my symptoms! Also diarrhoea most days on 2-4 occasions.