One foot swell more?

💖Amanda • Have a 5 year old from my previous relationship. Now married to my true love and baby #2 is due aug 2015
9 months and my right foot has started swelling.... It's more swollen (noticeably) than the left.... My blood pressure is fine according to the dr I saw sat but they couldn't tell me why only one swelled majorly...,. Anyone else have this problem?