37 weeks tomorrow. I'm retaining a lot of fluid in my feet and ankles. Sometimes it looks like I don't even have ankles. I have mentioned it to my midwife twice and she says it's nothing to worrying about unless I can leave an imprint of my finger in the skin? She says to drink lots of water (which I do) and prop my feet up so they are higher than my heart, at night when I sleep. But I was told not to sleep on my back while pregnant. I'm usually on my feet a lot, I'm still working and I have a 2 year old so it's kind of impossible to stay off my feet. Anyone have any suggestions?