“Constant headrush- should I be worried?”

I’ve had the occasional phases of having head rushes every time I stand and always added it up to low iron or dehydration. And after starting to watch those two things more (coincidence or not, I don’t know) they pretty much stopped entirely, and this isn’t like any of those other times. When those episodes occurred, I usually just had to slow down for a second and it’d go away within the minute.

This morning, however, from the second I got out of bed at 8:30 AM until as I’m writing this at 10:30 PM I’ve had a constant head-rush sensation. As these are common and have happened to me before, I wasn’t too concerned until I noticed that it would not go away. It doesn’t matter how long I sit or lay down, the feeling is still there. It’s worsened by standing or moving any part of my body quickly. I wasn’t able to work today because of it. It’s a constant fuzzy vertigo-ish feeling in my head. My arms and legs are also very weak like I just woke up and am still half asleep even though I’m not. Should I be concerned/when should I try to see a doctor? (Also, I don’t have insurance and can’t afford it out of pocket, so the longer I can wait before making an appointment the better)