When you find yourself in familiar territory, look beyond the conclusion that you are going backwards. Regression is not the only explanation.
Life isn't linear...and it's not just circular either. How about a multidimensional spiral? It may appear that we are going back over older territory, but this territory may have gained other dimensions since our last "return." I like to think of wisdom as just that--added dimensions. Many of us start with the linear, the straight line. Then we recognize the circle. Then we recognize the spiral. then we start to experience the double helix, the tertiary and quaternary structures. And, perhaps, eventually, the structure is so complex that even the most brilliant physicists cannot come up with the equation of life.
You are the only one who can define your experience. No one else. Are you regressing? Are you revisiting? Is this merely a passing thought? Is there a pearl of wisdom here--something, perhaps, you didn't see the last time? Are you creating drama? Are you feeling sorry for yourself? Are you avoiding the next step? Are you putting together your equation of life?
Only you know.