The whole puffy hands and feet thing went on for weeks with me without being a problem. The doc always checked them, along with bp and weight gain, and I told my dh and my co-workers to let me know if my face started getting puffy.
This last weekend, my SIL noticed my legs had gotten really swollen, and the next day I felt awful, and went in to see the doctor. Sure enough, my bp had shot up. No pre-e because there was no protein in my urine. Just hypertension.
Just have it monitored. The real change for me was that I *felt* different. I wasn't just puffy. The puffiness wasn't going down at night and I was so tired that I could barely drive, was calling people the wrong names, etc. If you start feeling really spacey, it's time to make a call.
My OB also recommended soaking my hands and feet in epson salts. She did attribute some of the swelling to the weather, as well.