Right knee is not doing what it should do. Now 45, history of Shark's mouth tear in Lateral menicus, repaired at age 27, arthroscopy aged 30. Painfree for many years, suddenly started clicking, locking, loss of function and quite frankly being very painful. No specific injury as cause, just has worked up to this over last 6 weeks or so. Getting so may have to actually take time off work or take some brufen! GP less than useless though admited have only them very briefly when they admitted to lack of knowledge and requirement for orthopedic referral. Physio's unable to see for 4 weeks due to their worklaod, ( though manged to get it down to a week due to being NHS employee) Any suggestions as to possible causes, possible self treatments till see professional?