You were given a great opportunity to grow. Take a thorough look at these old childhood events and see how your life has been affected by them (where you came short). I was wondering about your gender since this sponsor was male and your new one is female. If you're female you might have repeated a pattern. It seems to be God's timing to do some rearranging and healing there.
Leaving AA will be always an option but maybe stick around for now instead of running away?