Temp. lose of function left side of body when standing up?!

Temp. lose of function left side of body when standing up?

I've had a problem ever since I was a child. It impeded my sports and my life. Whenever I am at rest and stand up or make sudden movements my left side of my body temp. loses functioning. This includes my leg, my arm, my jaw becomes lazy, and my vision uncontrolled and blurry. It only lasts a couple seconds. There are different degrees on its severity. Some times it's not bad at all and I can actually stop it from happening by completely stopping my movement and standing completely still. Other times it's so bad that I'll drop to the ground because only my right side can hold me up. As far as I know I've never had any injuries before this starting occurring. I woud love some feedback. Thanks

I assume you have asked your doctor??? If you are not satisfied get a second,third, opinion. But if your just looking for possibilities. Stroke, neurological disorder.