T.L.
I don't have experience with this, but I would highly recommend that if the endo says they need to do some sort of hormone treatment, you need to get a second opinion. And not just any second opinion. Because this could literally affect her entire life (if they want to do hormone treatment) do your research and PAY OUT OF POCKET if you have to, to see the best endo you can find. And on top of that, I would try alternative treatments first, like making sure she is not on soy formula (too much estrogen) or reacting to something in her diet, try chiropractic, etc., anything besides synthetic drug/hormone treatments unless absolutely necessary.
(Do not go to Holtorf Clinics though. I have heard they will put everyone on something and they are totally shady. They prescribe outrageously expensive concotions that you can ONLY buy from them. I know too many people who have been totally scammed by this group of doctors. They prey on desperate people. I write this just because it is very possible if you do research you will come across this group.)
At any rate, I hope it's nothing, just baby fat :)