Hi Debbra I must said that I do have an awesome physical therapist, she pays very close attention to her patients. She notice that I wasn't performing as much as I had been which resulted in me losing ROM. I begun telling her what I was experiencing and she immediately text my surgeon and informed him that I need to be seen within the week. To answer your question I can't recall doing anything differently and definitely no falls. I really don't know what cause this problem. I did go to my doctor and he said that he is very puzzled he's not sure what is going on. He did an x-ray and said everything looks normal. He gave me a lab slip to have blood work to make sure there is no infection, he said that if the blood work comes back normal he is going to refer me to another orthopedic doctor for a second opinion.