Nerve damage or possible MS relapse

Hi Its been 13 months since my illness and was recovering we'll. A few days ago I was sitting in the cold and my legs were exposed. They both at the time felt told and mildlly numb. Then during the last few days the right leg has returned to normal but the left leg has an area above the knee which still feels numbish. The area on left thigh has lost about 30% sensitivity. I get this awful feeling it might be a relapse for MS? Any ideas thanks...

I've been sneezing a lot over the last week. So it may be pseudo exacerbation. It seems like these are caused by colds, virus or infection. Will monitor.