Kate Moss fears she is losing her short term memory.The 32-year-old model - who recently saw a brain specialist - is reportedly plagued by memory loss and has trouble remembering what meetings she has set up.A friend of the catwalk beauty told Britain's The Sun newspaper: "Kate's really worried about her memory, and specifically short-term memory loss. "She forgets day-to-day things and she forgets where she is supposed to be going after she has set off."It started as a joke and she brushed it off but now she's concerned something's wrong."Last week, Kate spent four hours with a top brain doctor but it is not known if the visit was linked to her memory loss.The mum-of-one flew into Heathrow airport and was taken straight to neurologist Nicholas Page's London surgery for mystery treatment.A source told Britain's The Sun newspaper: "Kate literally just set foot back in the UK and was straight off to the clinic. She didn't even have time to change her clothes."