premature thelarche--are there safe herbs that could help?

My daughter is 1.5 year old and has recently developed what appears to be premature thelarche of one breast. She hasn't been to the doctor yet, but the appointment is scheduled for Friday. Her favorite snack is freeze dried organic sugar peas. Some days it makes up over 50% of her diet (not including breast milk, which she drinks a large, unquantifiable amount of, nursing frequently in the night and 3-10 times during the day). She also teethed on a bit of plastic as a baby. Other than that, she eats organic and pesticide-free foods, loves to munch on kale outside, eats no dairy other than breastmilk and some sheep cheese. No soy, or processed sugars/starches, either.

Could the peas be causing the thelarche? Are there safe herbs that could influence her endocrine system and stop the thelarche?

Thank you so much! I'm worried that the the thelarche could progress into precocious puberty. I'm already planning on packing up all of her and her brother's plastics toys (they were gifts from others) in hopes of reducing the phytoestrogens that are coming from plastics.

I hope you're able to get some answers! My daughter is about the same age and I can only imagine how stressful it must be for you!

I wonder, how did it go. I would also use remedies myself, because it is likely, that you both were exposed to similar environment, and since she is nursing, it might come through your milk as well. But herbs/supplements also will come through and it is a good thing. Here is what I found:
Estrogen excess
Juicing and eating carrots help to reduce excess estrogen in the body.
Wild yam, Milk thistle, maca, vitex,
Resveratrol
DIM supplement
omega 3s
zinc, magnesium, selenium
B group vitamins
vit e
Take limonene -found in oils of citrus fruit and tomatoes.  Easy way to get it -use a quarter of lemon with a skin in a smoothie.
Eating foods low in fiber can also influence estrogen levels. Fiber helps the body excrete excess estrogen in the bowel. During constipation, stools remain in the bowels for longer resulting in estrogen reabsorption. Fiber also helps keep blood sugar levels balanced which is critical for optimal hormone balance. So eat lots of fiber.
Use liver support herbs such as bitters, because healthy liver can detox excess estrogen much better.
Avoid plastics, nonstick cookware, pesticides and nonorganic produce, that contains them, soy. Also, do not take receipts, unless needed as they contain BPA.