...everything except the blurred vision can be attributed to acute stress. I'm not saying that's definitely all it is but if you can manage to stay reasonably relaxed for a few days, do absolutely nothing if necessary, you may well find your symptoms start to wane.
Depersonalisation, when you've never felt it before is terrifying, and you can feel trapped in it. One way I found to deal with it was to simply remain somewhere very familiar, and to maintain regular contact with my family. Talk about how you feel, they probably won't be able to understand but you'll feel a bit better for it and it will help you to feel more connected.
And remember.....it will improve!!! Be patient.