It sounds like you might have pre-eclampsia. Make an appointment with your doctor immediately to assess your symptoms.
Welcome to the miserable end of pregnancy lol. Sorry sister. I was like this with my daughter for the last few weeks. I would suggest increasing your water intake due to you stating that your having "black floaters" with a severe head ache. That screams first signs of dehydration. Let your OB know all the symptoms that your experiencing.
Talk to your doctor it could be your pressure