I have recently been feeling tingling, aching and burning feelings in my breasts...the left more than right, and also right in the middle. What could be causing this?

Hi dipseydoo,
Have you recently visited your doctor and had a breast examination or mammogram?
Have you reported these symptoms to your doctor?
Here is information on bio-identical hormone replacement from the website, Harvard Health Publications Harvard Medical School:
Compounded drugs are mixed to order, so there are no tests of their safety, effectiveness, or dosing consistency.

Some clinicians who prescribe compounded hormones order saliva tests to monitor hormone levels. Most experts say these tests are of little use because there’s no evidence that hormone levels in saliva correlate with response to treatment in postmenopausal women.
Bio-identical hormone therapy is not FDA approved and compounding pharmacies are not required to report adverse reactions caused by their products.
The physician who prescribed this treatment for you is the best person to diagnose the cause of the symptoms which you are experiencing.