I don’t know how to explain it

But lately in the last two months of pregnancy I feel like I could almost pass out when I’m standing up. It’s usually in the morning so maybe it has to do with trying to get up and around too fast? Or I could be dehydrated since I’m not good at drinking enough water. It’s hard to explain, maybe it’s correlated with being heavier now, but my body aches all over and I feel weight on my chest. Nothing funky like palpitations or actually chest pain but it just makes me uncomfortable like whoa, lemme sit down. So basically I sit down and rest and I’m fine. My blood pressure is always great so I don’t think it’s serious like that. Just wondering if anyone has experienced this?