Hi, I've been experiencing sporadic bouts of what I might call "lightheadedness," though I'm not sure that's completely accurate. It occurs for a few seconds at a time, multiple times in a day, but rarely more than 1 day a month. It feels more like my mind could just float away from my body, like I've lost some sort of mental seat belt. I do not get traditionally dizzy, nor do I experience sweating or nausea. The mental feeling is the only symptom I am aware of. Today, it has occurred both while sitting and while walking, both before and after lunch.