What does one do if one has an estrogen and progesterone imbalance. My breasts feel so heavy but I'm not pregnant. My period is due in a few days, ?

Hormone changes. It is common for women to have breast swelling and tenderness or pain it's fibrocystic change and if its a problem discuss it with you gyn or try oil of evening primrose which can help.
Varies. During the normal menstrual cycle, Progesterone levels vary greatly. Thus, for many women who use Progesterone the dose has to vary depending on estrogen levels and other factors. For adjustments, cream rather than capsules allow for better regulation of dose. Generally start with a low dose such as 1/8 teaspoon of Progesterone cream. And work up slowly.