Hi: I Have Been Having Symptoms Of Extreme Fatigue, Where

Hi: I have been having symptoms of extreme fatigue, where I can sleep all day, and night. Aching pain in my legs and shoulders, foggy mind. If i try to get things done at home, I have to take a break in-between, as i get so tired, and feeling sweaty. I have depression, and it seems that if you have depression, everything is blamed on it. I'm going on my third month of this, and my husband is worried. I also have extreme low blood pressure which they tell me is the cause of this, but why am I so achy? Also have more headaches than usual.