Believe me, I think you are doing a WONDERFUL job at this, especially considering how you found out, and that she is already 7 months along! You DO deserve an award! You stand beside your "daughter", proud to be with her and supporting her through what must be so bizarre for her. All of the changes that she will see in her body and her social life will mean continued support even after the little one arrives. And from what I have learned about you, you will be there for everyone! That is a lot to ask of someone, and some may choose to ignore the situation and not be as helpful and supportive as you have been!
CONGRATULATIONS on everything! By the way, I bet your Mom is proud of you... after all, she is the one who helped you to become the wonderful person you are! ;)
