I wonder if it might just be fluid retention. I have this all the way down both legs. I saw the midwife this morning and mentioned my swollen feet and ankles. She said I am carrying alot of excess fluid. When I press on my skin it changes from pink to white and depending on how long it stays white for indicates how much fluid you are retaining. A normal sign of pregnancy i'm afaraid. Make sure you keep drinking plenty though.
Best Wishes
