You never know either it's right or wrong when you do something unless you're a scientist or perform a set of instructions. Life is neither the first nor the second. If somebody says that they do know what to do they are either a liar or stupid (sorry). The only way to learn if a decision is right or not is to travel to the future and see from there. We are left to wander through uncertainty.
But it's not that bad. I need to learn how to live with this to embrace the reality and keep going. To become confident in my decisions I need to choose who am I and what's good for me. Once I stick to the set of guidelines I'll be able to let the hassle go and free time for things that really matters (even if they doesn't, which is a part of another theme).