As other girls said you can get the swelling without it being PE. As BP doesn't appear to be an issue hopefully will not be serious just one of the wonderful little 'extras' that we get given for being pregnant. Think it is really only when it moves to your face that you need to be concerned about PE.

I think I've also read somewhere that it can be effect by the way the baby is lying. I think they can lie on blood vessles that effect flow of blood (duh obviously!) and this in turn leads to water retention which of course leads to swelling. Sounds weird but increase amount of water you have each day as this help reduce swelling.

Would defo ask OB or doc about it though to be sure.