Lot of confusion and unclear thoughts.

Please advise suitably after analysis of the case. What could be the reason and remedy for continuous thoughts regarding the decisions made by me during different phases. These are related to my own career choice long time back, school selection for my children and college selection for grown up child doing undergraduate studies. All the decisions seem to be wrong and wish there could be some other good choices which could have worked well. Also think that what others have chosen have benefitted them all and they are very happy with what they have done. But in my case the things are totally in contrast and the decisions taken by me regarding my career and employment yielded no good results and it was all waste of time to pursue the non yielding business and career. Always have feelings that at the time of decision making ,some things always stop me in doing the right things. Always longing for some good results and having feelings to do many things at one time.