Answer
(Fatwa: 440/?=H/1430)
Such dreams are generally inspired by the Satan; it is natural to be disturbed due to such dreams, but in-shaAllah this will not harm you. You should go to sleep in the state of wudhu, recite four Quls (Surah Al-Kafiroon, Al-Ikhlas, Al-Falaq and Al-Naas) with durood seven times before and after, blow on hands and lie down on right side. Also, recite: لاحول ولا قوۃ الا باللہ العظیم thrice with durood thrice before and after, and blow on chest after every obligatory salah.
Allah (Subhana Wa Ta’ala) knows Best
Darul Ifta,
Darul Uloom Deoband