wa aleikum assalam,
yeah been u r right...long after i posted this...i heard and islamic QA show and the maulvi said that dont use quran as a source of healing...instead use it to recite for the blessing of ALLAH...In weak ahadith it is heard that during night..Prophet (pbuh) used to recite surah akhlas, surah naas and surah falaq. also there is a weak hadith on reciting surah waqaya, and surah ahzab.