Sir Paul McCartney is regularly visiting his doctors for stress tests as he prepares for his bitter divorce with Heather Mills. The 64-year-old singing legend has been under stress since separating from Mills in May (06) and is making sure his health doesn't suffer in the long-term. MCCartney visited the London Clinic in the British capital's famed Harley Street yesterday (10AUG06) for several hours. A source tells British newspaper Daily Express, "Paul came in with his daughter MARY and was complaining of not feeling well. "He was seen straight away by a specialist who gave him a thorough examination. He was checked for his heart rate and blood pressure. "He looked quite pale and was obviously feeling out of sorts, but after a through examination he was given the all-clear and told there was nothing to worry about.""