Hi Sylvia
Your increased pelvis/hip pain is worrying and unintentional weight loss is never good so it is possible that your MGUS has progressed to myeloma. The tests you need, at least for now, are blood paraprotein level test and serum free light chain test. If these are normal, ask your GP to refer you to a specialist. They can arrange other tests such as CT and MRI to check if there is anything going on. Even if everything is normal, it would be great to know that the pain is not due to myeloma, don’t you think?