The holy Qur'an says that believers should act upon knowledge: "And do not pursue that which you have no knowledge" (17:36). The idea of acting according to guesses and conjectures have been clearly rejected: "And they have thereof no knowledge. They follow not except conjectures, and indeed conjectures avail not against the truth at all" (53:28). Consequently, the one who is not able and is not qualified to deduce religious rulings should follow an expert and a mujtahid to learn the necessary details of Islamic law that are relevant to his life and situation. Not doing so would imply to follow conjectures of his own self or non-qualified people and this is condemned by the Qur'an. It is also possible to act according to precaution which implies to take the most precautionary steps and opinions but this requires a considerable amount of knowledge often difficult to attain for the ordinary person; it is therefore advisable for those who are not experts in religious sciences to follow a fully-qualified mujtahid whose knowledge has been fully established.

With prayers for your success.