Since August, My Calfs And Legs Feel Like Tingling When

Since August, My calfs and legs feel like tingling when I stretch my legs. I notice it become pattern every night. Some days I would get swollen feets and calfs. What is it and what s wrong?? I have set dr appt on Thursday morning. I am only 39 years old and I am probably too young to have the issue?? No, I don't drink sodas. I drink a lot of water during day and evening. Maybe One cup of cold Tea. It seem become worse now like if I want to knee down to get something from kitchen cabinet. I cldn't do it anymore. Felt like my calfs so fat. or I would knee down on rugs to play gameboard with my children. I couldn't do that. Thank you..