Feeling off

Periodically over last couple of weeks I have these moments where I have a headache, difficulty focusing, my hands feel heavy or maybe like they need more blood—like they’re about to fall asleep and I have a hard time breathing/standing. I feel like it has happened when I’m driving a lot but not just then. I mostly was thinking pregnancy is just uncomfortable. But now I’m wondering if it’s more bc I feel like I just have to lay down and can’t do anything. Does this sound like blood pressure or blood sugar or what?