What Causes Bruising On Arms And Legs?

I have been getting unexplained bruising on my arms and legs that last weeks. I have a hard time getting to sleep, but when i do i experience lots of fatigue. I have been experiencing nausea eary in the morning, and I have at least 5 hot and cold sweats a day. What is going on? . . . . and no I am not pregnant. I was abused as a child, and someone thought that all of these symptoms could be do to some hormonal problem as a result of the trauma. Is this possible? If yes, what can I do about it?