Please help eye doctor can't find anything wrong with my eye?!

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I wonder if you may have some slight early cataract formation. This could cause your symptoms and an inexperienced eye doctor might overlook it. Go to another eye doctor for a second opinion.

Me. I am an optometric physician.

Double vision at nighttime but normal vision during daylight?

Well if your eyes aren't able to point in the right direction then it can be ONE of the causes of double vision.

When you walk at night do you feel less relaxed than at daytime? its a good idea to ensure you dont alarm yourself unnecessarily. So if you know your eyes can turn and move effortless (without any difficulty) then that might rule out eye muscle issues. At nighttime pepole usually use their peripheral vision more because the central part of vision is less effective in dimly lit surroundings Do you have issues with everything appearing too dark? Do you think everything appears darker than for others? that might be worth asking about.

The cloudiness of vision sounded strange. If you are researching it try focusing on that as well as the double vision aspect.

Nowadays websites are very clever and can help diagnose many conditions. (But obviously talking to someone face to face will always be more effective.)
You can try putting in your symptoms and see if any results are worth investigating:

http://www.webmd.com/

Also dont restrict yourself to the opinion of one professional. Try to find someone who may be able to give an alternative diagnosis. This is because you cant expect just one person to be able to diagnose ALL medical problems out there.