Is the questioner afflicted by jinn possession, and what is your advice to her, given her suffering from obsessive fears and disturbing dreams, and her feeling of trembling upon hearing ruqyah and supplication?

We cannot inform you if you are afflicted by possession, and we ask Allah to grant you well-being. We advise you to sincerely repent to Allah, strive to obey Him, and avoid His disobedience, for trials may descend due to sin and are only lifted by repentance. We also advise you to consult specialists in psychiatry, while maintaining the Sunnah-prescribed adhkar (remembrances) and ruqyah shar'iyyah (Islamic incantations for healing).