Please Help ,Toddler chest is growing

My daughter is 2 years and 3 months old.Recently i noticed her chest growing and i mentioned this to by doctor during her check up.She said it could be symptom of early Puberty and we need to watch her closely.My doc did mention that in chubby baby it can be possible due to weight but since my daughter is very skinny her breast growth is very visible.She gave me appointment after 3 weeks to come for check up and mentioned if needed we might need blood work,x-ray,etc....She checked her underarms and diaper area if there is any hair.but nothing was found...she said we need to be concerned if we see hair in those areas.But i could see hair growth on her hands and legs for the past 2 months which she mentioned as common in few kids....

Is a little growth in breast are in toddlers age common?any experiences....Please share

We are devastated after talking to doctor , couldn't do anything all day...How can a 2 year old be close to Puberty?I have no words to explain how sad we are after this news...my daughter is very happy kid who smiles all day....

Please share with me if you have ever heard of this situation for Toddlers.We give our daughter organic food as much as possible.....I really appreciate if you can share your experiences.We are praying to god that this should be false alarm and she should be healthy.I cant even imagine my daughter going through Puberty this early........Please pray for my daughter!!!!

Please Help ,Toddler chest is growing