Don't take it back!

Once you've given your problems over to God, you ought not take it back by continuing to worry about the outcome. Trusting/believing you will not regret that decision, specifically because of Who God is, is how you hand them over. You take it back however when you refuse to forget believing this is how you never allow yourself to ever get hurt again. Ego convinced you this is how it protects you hence the term "forgive but don't forget."

Once you "hand it over to God", you must forget about it or you'll take it back yet try to convince yourself you've moved on when in fact you're stuck in that time (the past.) There is no progression in holding on to the past because the past is always behind you, gone, done, over, finished. The only way to move on is to know that God is in control, not you! So do not allow not even one thought about those which are no longer yours to enter your mind. It doesn't take long for those thoughts to grow and fester causing all sorts of new problems like, stress, depression, and if not stopped in time, suicide. 

Don't take it back because you will be holding on to nothing. Allow the Holy Spirit to show you there is nothing to ever worry about once you've placed them in His hands. Choose rather to be led by the Holy Spirit Whom removes all fears, doubts, worries, anxieties, etc. Because you didn't create yourself, you need not worry about yourself. Recommit your life to God by living according to His Will and not according to how you think things should go. Ask God to use you to bless others - this is how your life is blessed. 

Once you've given your "stuff" to God, don't take it back!