Tamoxifen - herbal remedy for hot flushes

Hi, I’ve been on Tamoxifen for 6 months following a lumpectomy in November. The hot flushes during the night are really starting to affect my sleep - haven’t had a full nights sleep for months and wake up exhausted and damp!. I don’t want to take more prescription medicine and wondered if anyone could suggest a herbal remedy for the hot flushes. Thanks