Why does someone experience anxiety, panic attacks, and headaches after discontinuing Escitalopram?

Hi doctor,

After I decreased the dose of Escitalopram to 5mg, I started feeling anxious about everything again. I felt anxious about death, and also I had a small headache. I watched a drama for five days, and I liked it, but my mother said it was not interesting. After that, I became quite anxious and lost interest in the drama. And for two days, I felt super anxious and had panic attacks. My stomach hurt so bad, and I could not sleep. After I heard that my sister was going to start a job, the symptoms got worse, and I always felt anxious that my sister was going to work. Our routine and sleeping hours will change, and she cannot spend so much time with me. I feel very anxious, and this is not my first time. My stomach hurts, I do not feel like eating anything, and I do not want to do anything, and I want to cry and also, I am afraid to consult a doctor, or the medicine will have bad side effects. I took Escitalopram for seven months to treat my anxiety, but after the doctor stopped prescribing it, I started to experience anxiety. I restarted my medicine again and stopped it for two days, and I did not know what was wrong with me and what I should do? Please help