Destiny And Regret
As salamu alaekum, This is perfectly normal and part of Humans nature. Humans are meant to do mistakes and learn from it and its integral part of Humans evolution so don’t stress over it. As per my own experience the “what if” mindset or perfectionist approach could cause such situation when making a decision and later on if it does not work well the overthinking gets the best of me. My only go to solution in such situations is “Allah malik hai”, “Allah behtar karny wala hai” and move ahead.