Tri-color sable pom mated with teacup blue parti

I am scared - this is the first time one of my dogs have mated. My female is the tri color sable and my male is a blue parti, and he is only 8 months old. They say 62 days which will be 3/23/10. Will this in anyway harm my female sable when giving birth? I am setting an appt for next week and this came unexpected. I thought he could not mate b/c of his age. I was wrong of course, but I am concerned on any outcome that i am not aware of, if there will be complications with her giving birth to a smaller breed. Also, she is almost four years old - 4/30/10 is her birthday, and his birhtday is 5/31/09. He's a baby - he weighs about 5 pounds if that and she weighs about 15. Now of course i am guessing - she might be heavier then that now but he is light as a feather. Could some please tell me if she will be fine. She is my baby - they all are - but mommy never had to deal with puppies before and I am scared for her. Thank You, Lisa