This has only happened to me twice, both this week, and never during my previous two pregnancies. I'm 20 wks with twins. It freaks me out because I watch too much "Baby Story" on TV and know how scary pre-eclampsia can be! In research today though, it seems like this is not a cause for alarm unless you have nausea, headache, high blood pressure, protein in urine, gain over 2 lbs per week, or a racing pulse. My sister's feet would swell up a lot during her pregnancies but it was never a concern. Anyone else experiencing this so early?