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This is Dr. David
what is your TSH level?
your cortisol levels need to be checked in the AM since cortisol levels are naturally higest in the AM
and you also need ACTH levels as well when you get am cortisol levels to check your ACTH
you also need FSH and LH levels checked.
at your age, you are close to menopause or in menopause which will cause declines of your estrogen levels and this can cause you to gain weight.
estrogen will increase the metabolism in women
when estrogen levels decline, you can gain weight from declines of your metabolism.
going off birth control pills will also decrease the amount of estrogen in your system as well