u/Gunslingermeowww_12

I’m 18, female, 5’2ish and ~120lbs. my physical health is okay, I’m fairly sedentary and I know I should exercise more. this doesn’t always happen, but usually if I get up too fast, I fall over or at least wobble a little and get some headrush. I don’t stay “out” for a long time at all after I fall, maybe like half a second. I’ve fainted once when I was sick and it doesn’t feel the same as whatever this is, so I would like to know if this is normal or if I should be concerned about an underlying issue?