I think you are supposed to worm them while they are pregnant...I know dogs you are...Just call the vet to make sure but I really think you can worm them...
You need to stop worrying about him and you need to live life to the fullest and be a 13 year old...
Then I would get German shepherd, pitbull, lab, something like that would be huge when they grow up if its 9 pounds then it will probably be big what kind of dog is it that you are looking at...