As Lucy said, the past is gone and you can't change it.
The question becomes do you regret doing what you have done?
If so, forgive yourself and made amends as appropriate.
If no, then give yourself a good talking to and fight off the undeserved guilt.
Yes there are always at least 2 sides to every story. But, you are only responsible for your side. You can only kow what you need and want at a particular point in time. Second guessing yourself now can be particularly unproductive since you have done a great deal to improve life for yourself. Creeping doubts can sabotage progress. I know that from personal experience. Perhaps replaying the tape and remembering why you took the actions you did will help you understand whether you have done anything you legitimately can feel guilty about?