Don't worry... be Positive!!
Positive thinking is one of the main key for a successful, happy, healthy life. People who are positive and live thier life 'in the moment' are really lucky. So if you can stop worrying about what you've done in the past,and stop worrying about how your actions will affect your future...then you will open yourself up to all sorts of positive events and people that the 'new' you will encounter.Everyone has to worry...but you must try only to worry about what you (and only you) have direct control over.Worry about anything else outside of that...and you will probably be worrying about something that may never even happen.
Nobody has the 'perfect life' and everyone has the ability to manage the positives and negatives in their lives. So its in our own hands to not to let the negatives on top of us...otherwise they will just overtake the positives - and we will be constantly miserable as a result.
So always be positive & happy :)