Vision change?

I normally need glasses, as I have bad vision. But today seems different, not sure how to tell what is my normal bad vision or if it’s gotten worse? I’ve been seeing white spots here and there. I’ll wake up at night and it’ll almost be like flashes of light in my vision, but it’s hard to tell if it’s because I’m half asleep or what. I have no preeclampsia symptoms other than the vision? I feel weak though. Like sitting down it feels like I walked 10 miles and my legs are so tired. I usually have low bp, so idk if I’d even be able to get high bp because it’s normally low. Babe hasn’t moved as much today as she normally does.. so I’m thinking I’m going to call my midwife, but I’m not sure if it’s something to call over. Idk how to tell if my vision has changed really..