Karin, I'm not sure how old you are but given your avatar and the fact that you've entered surgically instigated menopause I believe you may need HRT. And the patch may not be sufficient.
IF you are significantly hormonally deficient the patch may not allow enough hormones to be infused into the body over the patch's life span. What I mean by this is, the more hormones you need, the patch may be used up too quickly, leaving you hormonally challenged by your patch change date.
Finally, FWIW, when I was hormonally challenged, weight loss was exercise in futility. Not to mention the fatigue driven NEED to eat in order to try to improve stamina.