ANSWER:
Fearing the dark is normal. However you must maintain your daily adhkars day and night, before sleeping and before moving out of the house.
Recite Quran and ignore such thoughts. As long as you observe your prescribed adkhar and have complete reliance on Allah nothing can harm you. Such fear is from Satan and he is laughing at you! Continue with ruqyah until you are cured by the will of Allah.