The last couple of days I've felt dizzy at times, not nauseous, more like being on a boat, as though the ground below me wasn't steady. I occasionally get light-headed in the heat but this is more frequent. Strangely enough I don't notice it when I'm up and moving around, it's more when I'm sitting still. Also while it's warm here it's no warmer than I'm used to. Any ideas? My first step is going to be to go get a blood pressure check, but any ideas will be welcome.