I am thankful for my trials because it brings me closer to God. Sometimes we get caught up so much in our daily activities that we forget what is REALLY important.
Personally, I think there are many worse things in life than a little bit of Pot. I don't think it should be a reason to hold you back from going to church and communicating with God.
If you feel really bad you could always go to the manager and offer to pay for the things you stole years earlier. They may look at you funny, but it will enable you to "let go".