Shiba Inu Puppy Aggression

Hi Everyone,

I just got a new Shiba puppy last week and things have gotten off to a rocky start. The first couple of days were pretty good, she was playful and curious as all new puppies are. However, the past couple of days as she's become more comfortable with her new surroundings she has begun asserting herself more and this has lead to her lashing out very aggressively towards me. She is only 9 weeks old. I did as much research into this prior to getting her and I knew that this aggressive behavior was a possibility but now that it's rearing it's ugly head I'm a bit at a loss as to what to do. The advice i've been getting is that very mixed. I've heard/read everything from, people saying she's just a puppy and to give her a few more weeks before becoming concerned to others who think i should start to discipline and correct the behavior immediately. My instinct tells me that I should be firm with her when she displays this behavior, however, I'm also told this might result in a negative effect since she is so young and it might end up turning her off to training and bonding with us. Any thoughts are appreciated.

Thanks in advance

What is she doing?