I'm really worried that I have some form of cancer. I've suffered with unexplained fatigue for a few years but in the last few weeks it's got so much worse. I've had to cut right back on working and getting hardly anything done in the house. Have no appetite, vision is blurred constantly and last couple days I haven't even had the energy to get dressed. Joints in hands and legs are really painful. I feel so miserable and depressed right now. I'm a single mum to a teenager and I'm struggling with everything and she doesn't seem to understand how poorly I feel.