What should you do if you prayed Istikhara and your heart was not at ease with the matter, and you remained stressed in your study schedule, knowing that withdrawing from some courses might be in your favor, but you fear regret?

Scholarly opinions vary regarding what the person performing Istikhara should rely on after the supplication. What is fatwa-approved by us is that a person should proceed with the matter after performing Istikhara, and should not abandon it unless Allah diverts them from it. Therefore, if you have performed Istikhara regarding stopping some courses, then proceed with that. If it is good, Allah will let it proceed; and if it is not good, Allah will divert it from you. Do not rely solely on the presence or absence of a feeling of comfort in your heart.