I am 41 year old. I have a problem of anxiety and over thinking. It was develop due to high acidity in my stomach and I felt like something is very bad with my stomach due to severity and felt a panic attack. My doctor suggested opipramol 50 mg one per day at night. At the starting I did not notice some effects but after some days I felt that when I about to fall a sleep I feel a pulsating shock and my body jerks suddenly. I ignored it at the starting. But now I am feeling tension neck pain and nightmares and waking up in the night I wake up 2 to 3 times with heavy head, thirsty and trembling. Always I wake up due to nightmare. During the day even a smallest tension causes tension headache and pain increases at the back of the neck with tense muscles please suggest me do I need to continue this medicine. It is almost 2 months now since I am using this medicine. During the day still I feel anxiety due to these effect. Please suggest me. It is difficult for me to get regular appointment of doctor.