Most our fears making irrational decisions if we really look back, are normally made trying to please others or fit in.
One way or the other you will regret some decisions made, living with them, learning from them is what makes who we are.
Find one person who lives without regret, you might as well make your own decisions growing in self-confidence.
I believe that learning/growing from poor and even bad decisions brings a more profound "human experience" and impacts you on a deeper subconscious level.
Most definitely, burn yourself once you will most definitely remember.