I've had a bit of swelling on days I've been more active. It's always a good idea just to ring for reassurance. The problem with swelling is it's a totally normal symptom of pregnancy, but can also be a symptom of something more serious. I think I started with swelling at about 30 weeks with my little girl and I just took it as a pregnancy symptom. Turned out it was one of the first symptoms of pre-eclampsia, though I was swollen all over! My face was puffy, my wrists had swollen as I could barely fasten my Pandora and there's normally a gap of two fingers. My legs were so swollen that I could push my thumb in it and it would leave a dent for five-ten minutes. Always best to get advice if you're unsure.