Sayyed Mohammad Al-Musawi, Sayyed Mohammad al-Musawi is originally from Iraq and heads up the World Ahlul Bayt Islamic League in London. Other than being involved in various humanitarian projects, he frequently responds to... Answered 2 years ago

If you are sure that you prayed five Rak'ats, then you must repeat the Prayer, but if you have doubt, after you have completed the prayer, then this doubt has no value and your prayer is valid.