I have noticed that I am swelling only on my left side (ankle and foot). Is this something normal?”
No. Notify your doctor as soon as possible, since there’s the risk that you may have developed a blood clot or are having serious circulation problems.
All-over body swelling during pregnancy is normal and is called “fluid retention,” or “edema,” and it typically happens during the last months of pregnancy or when it’s really hot outside. Changes in blood chemistry are partially to blame, also the pressure that your baby is putting on your internal organs and your lower body. Pressure inside your veins from the increased blood volume they have to carry may also cause fluid to leak into surrounding tissues. In these cases, staying off your feet, or raising your legs during the day and sleeping on your side at night may help. But noticeable swelling in one leg in comparison to the other isn’t normal and could be something more serious, so get that leg checked out now, rather than later, please.