Blue cohosh is potentially toxic. This is not a natural hormone replacement like phytoestrogens. Menopause is complicated. Physical changes from estrogen loss are mixed with psychosocial changes from empty nest syndrome, fear of aging, and other common daily occurrences. If you want to help yourself, concentrate on protecting your bones and heart and avoid useless products that have not been proven to be either effective or safe.
Hot flashes are very annoying and can usually be treated with or without hormones.
Now you have arrived and can be a real adult. Eat a balanced diet. Don't gain weight. Regularly exercise your mind and your body. Use alcohol with caution.