Swelling in foot, ankle, and calf? When to go in?,

Ashley
I am 37 weeks. I have had swelling in my feet since I was 33 weeks and it hasn't been that bad. I have been off my feet and had them propped up for the last four days because I have been so tired and connections are starting to get more noticeable. I looked down at my feet today and my right foot, ankle, and calf in swollen to twice the size of my left. I have been drink plenty. My foot is a little bit red and when you press on the skin it doesn't bounce back like my left foot does. My doctors appointment isn't until Thursday. I am wondering if I should call someone or what it could be. The swelling was very sudden because my leg was not like this in the morning