Aww Marilyn, what a happy (and stressful!) time for you! I understand how you would be feeling such a wide range of emotions and it will take some time to get used to the new situation, but as far as I can tell you raised a wonderful daughter and she will do just fine. You may even be closer after the wedding because the two of you will have a lot more in common then.
Tell Lissa that I've been thinking of her and I hope she has tons of fun on her wedding day! Congrats!