painfull right leg

can anyone help i hav a new symptom my right leg is very painfull from lower right side of my back right down my right leg , wen walking i feel as if its giving way and also knee clicks sometimes the leg is very heavy compared to my left leg my partner told me to go to gp but i dont want to as i dont want to go with another symptom , i am still awaitin lumbur punture and other tests basically i feel like crap but just trying to get on with it xxx