Pain Started Out of nowhere

Last month I woke up with sore arms and legs and it has not gone away. I tried stretching and resting but nothing helps. I am not sure if I should just wait or go to the doctor. Does anyone know where to find info on unexplained muscle pain in arms and legs causes, why mysterious pains happen without obvious cause, when to see a doctor? Need to figure out if I need medical help.

A friend of mine went through something very similar. She woke up one week with aching arms and legs and assumed she had just slept wrong or overdone it at the gym. The pain lingered for weeks, though, and that was what finally pushed her to look into possible causes. She found unexplained muscle pain in arms and legs vitamin deficiency helpful because it explains why muscle pain can sometimes appear without an obvious reason and discusses situations where it's worth seeing a doctor. In her case it wasn't anything serious, but she was glad she stopped guessing and got more information instead of waiting indefinitely.