Hi Cricket
Yes it is normal. It is cause by the extra fluid you now have in your body (up to about an extra 75%) and also the weight of your baby slowing the fluid return from your lower limbs. A couple of things you could try to ease the swelling is to put your feet up whenever you sit down. Go for a short walk every couple of hours. Raise the bottom of your bed so that your eet are higher than your hips.