Natural alternatives to Tamoxifen

Hi i’ve recently come off my tamoxifen as I am planning to try a cycle of IVF which was delayed from last year as I was diagnosed just before I was due to do it.I wondered if anyone has managed to find any ways to reduce the oestrogen levels by changing their diet, herbs, etc? My Oncologist did say I could come off it to try but will need to go back on again later. If I’m successful in getting pregnant I’d like to keep my hormone levels as balanced as possible. Any suggestions would be helpful. Thanks.