Signs of preeclampsia?

I have my midwife appointment tomorrow and I can't wait to have the relief of telling her how I've felt recently. I checked my urine earlier as I thought I had a wee infection. Turns out I have protein in my wee. I also have low blood pressure so not sure what's going on. Been very dizzy and sick recently. Almost passing out at times! Anyone know if this is a sign of preeclampsia or something else?