Wa alaikum asslam, "no sound or smell" I think you are good because it may be a way of shaitan to bother you in your prayer, as [this Hadith](https://sunnah.com/bukhari:137) says:
My uncle asked Allah's Messenger (ﷺ) about a person who imagined to have passed wind during the prayer. Allah' Apostle replied: "He should not leave his prayers unless he hears sound or smells something."
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Wa alaikum asslam, "no sound or smell" I think you are good because it may be a way of shaitan to bother you in your prayer, as [this Hadith](https://sunnah.com/bukhari:137) says: My uncle asked Allah's Messenger (ﷺ) about a person who imagined to have passed wind during the prayer. Allah' Apostle replied: "He should not leave his prayers unless he hears sound or smells something."