Should i be losing feeling and mobility in my leg if i sit cross legged for like 20 minutes??

It sure can happen.: ...Putting pressure on a nerve for 20+ minutes can cause the affected limb to essentially "go to sleep." When you take the pressure off of the nerve, those symptoms should go away promptly. Sometimes, people feel a tingling or pins & needles sensation as the nerve "wakes up." If it persists or occurs in situations that shouldn't cause these symptoms, please see a doctor! Dr. Anne