33 weeks pregnant and really blurry vision?!?

Sorry to make this so short but even typing this is making me dizzy... I've had little flickers of light in my vision and I didn't think much of it but today it got to the point where I couldn't even look at my phone without getting dizzy and can't really concentrate on one object for a long time cause my visions so messed up. It's hard to explain but it just doesn't feel right... I'm worried it could be pre eclampsia because I had an awful headache and nausea the other day, but no high blood pressure, but definitely an increase in weight gain dramatically... anyone have this? or know what I should do?