How Can severe Pain In The Hip And Leg Be Treated?

I have a deep dull pain on my right side. I can feel it every time I move. I feels like an ovaries but I am 58 years old. There is pressure on the inside of my right hip, an gut. I feel really awful, almost like I have the flu. It hurts to move my leg, or lay on my left side. I also can not drink enough water. I have a head ache that wont go away, and just feel disconnected from myself. All I want to do is sleep, drink water, and not move. I am on thyroid medication, and tend to have low blood pressure, about 110 over 60. My joints in my arms, shoulders, and knee hurt.