Tea tree oil is also supposed to Phyto-Estrogenic. I am using Sundowns Pharmaceutical grade Tea Tree Oil mixed with Eucaluptus essenetial oil as a pre-massage treatment.
This link has several diffrent home remidies for toe nail fungus.
http://www.home-remedies-for-you.com/remedy/Toe-Nail-Fungus.html

They recomend also adding olive oil to the mix or using it plain. I may have to try some of these. I happen to have a big bottle of Apple Cider Vinagar I haven't used yet. I have had the same problem with the fungus. Nothing seems to get rid of it completely, ,it always comes back.

Hope this helps.