Hello and welcome! As someone else has said, you are in the right place for support and information. This board really helps me.
About the pregnancy thing...maybe you could use that as a motivator? But be careful not to put too much pressure on yourself to make that goal, or it could end up backfiring. I understand about getting married and gaining weight...I did the same thing except it happened before we were even married! I wanted to keep him happy and since food makes me happy, what better way to make him happy?
You have to move on from gaining the weight back. Not forgiving yourself will only hold you back and contribute to eating more. You learned a lesson from gaining it back, and now it's time to move on. You can do it, you've proved to yourself that you know how to lose weight and are capable of it.
Come back here often, post and read and get support from all these wonderful people!