I've been having issues with swelling (mostly mild) since about 13 weeks - I'm now 21 weeks. I think it has a lot to do with your level of activity, temperature, and diet. We went to the lake for the 4th of July and I was VERY swollen for two days afterwards. I think it's because I was out in the heat (Florida summers are brutal!) and also because I ate lots of salty foods. I also notice that if I sit at my desk all day, my legs are especially swollen. Gives me a really good reason to come home and put my feet up!
By the way, my blood pressure is fine. I asked my doctor about it and he said there are two groups of pregnant woment - those who swell and those who don't. He said his wife's nose even swelled when she was pregnant. I would definitely ask your doctor about it though, and keep a close watch on your blood pressure.
I would let your Dr know just because it could be a symptom of preeclampsia. But everyone is different. My cousin had severe preeclampsia with her second pregnany. She hated the experience so much she had her tubes tied. Anyway, it sounds like edema. Idk.
Sometimes when I stand too long my legs get swollen. Sort of feel like water balloons... or something.