I Am A 52 Year Old Black Female And I

I am a 52 year old black female and I started getting off balance a while ago. I could just be standing still and have to catch myself. After that I started having muscle pains in my back thigh then it moved to my bottom now in my hip. I now have developed a cough that will not stop and I get shortness of breath when I talk I was looking at Glycogen storage disease type 2 could that be my problem