Pam - are you taking your antidepressants? If not, sounds like you need to be back on them.
Have you had your thyroid checked in the last year? If not - get it done. Thyroid problems can make you feel this way too.
How are you doing at taking care of yourself? If you aren't eating a healthy diet and exercising regularly - get started! Your brain is an organ just like your kidneys - it needs proper care and feeding to work properly!
