I am a reasonably healthy 62 year old female on the slim side 5 6 ,119 #. I have been experiencing a sensation of weakness in my legs an feet and extreme fatigue.e Blood pressure has always been good. Hypothyroid is treated w/ levothyroxine. Allergy testing showed positive response to mold, dust, pet dander and oddly enough, cockroaches. nothing else has presented itself, but lately experiencing minor headaches. What is happening to me? The more it occurs, the more it results in nervousness.