Easily brusing can be caused by medications, a bleeding or clot disorder, and other conditions that affect clotting.
You can read more info about this at http://www.webmd.com/hw/health_guide_atoz/aa61131.asp
As far as muscle cramping and sleeping, it could be that you are coming down with a cold or flu. You definately want to see your doctor though especially with the easy bruising.
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