If it were me, I'd go straight down to the ER. I noticed you've been checking your BP - the first thing I thought of was pre-eclampsia, and I'm not sure if you necessarily need to have high blodd pressure first, iykwim?

Maybe you could ring the Nurses' helpline for your state, but I'm pretty sure they'll tell you to go get checked out.

Good luck, and let us know how you go!