Talk to General Physician on Legs Gets Too Cold

My legs get too cold suddenly. From last 2 months I dont have any physical activities i just spend whole day on bed at home and on chair at office. My legs gets too cold its like poor circulation in legs while sitting. I am really worried about this one. It feels like blood not circulating in legs. When i stand up my shoulders get stiff and sometimes i feel shivering inside my body. What is this can please anyone help this out 3 months ago i was a daily gym going person and physical active after my sister died i am not able to do anything. What tests should i perform to check the causes??