Feeling faint when standing too long?

Heather

Does anyone else here feel faint when standing up for too long? Sometimes when I’m shopping or standing at the mirror getting ready for the day I feel a little faint and a little sweaty, that i need to sit down for a few minutes. I don’t feel dizzy or like I’m actually going to faint, maybe more lightheaded? I’m 27 weeks. Is this normal? Anyone else?