I Broke My Fibula 5 Weeks Ago. I Am Experiencing

I broke my fibula 5 weeks ago. I am experiencing swelling on on the sole of my foot behind my toes when I have my foot down. My foot gets red when I have it down for any period of time. I did not need surgery. I am able to put some weight on it and my heel feels spongy. Over a week ago I went in to have the cast changed because it was tight and they slit it on both sides to give room for swelling. Should I contact the office.