Please do your new puppy a BIG favor (actually of her life) and do NOT take your puppy home before TEN weeks of age. These last two weeks of her life are extremely important for her to learn so many things from her Momma that will have a big impact on her well being and for you to have a good dog in the future!
If you have any doubts what I am talking about...PLEASE ask around here on YT and find out for yourself.
Like so many of us here we all jumped in with our hearts when we got our babies without doing our homework and have paid for it in the end with dogs that could have been more well rounded if we could have been more patient to wait for them to finish doing what they needed to do with their Momma's.
Congratulations on your little one...she's adorable and I hope she recovers from her "lump" and gets a clean bill of health from your Vet!