Ashley_123, please don't be at all concerned about this. You have noticed a completely normal phenomenon called "physiological diplopia". Your double vision does not involve the actual object you are looking at, but an object either behind or in front of it.
The eyes work in pairs to give us full 3d vision. Because they're offset at slightly different angles in our heads, each eye gets a very slightly different picture from the other.When you look at something, the brain merges the two images to form one single picture, but it leaves the other objects in your field of vision still as two separate things.
Try this test : hold two different coloured pens in line with each other in front of your nose, with the nearest one (a red pen, for talk's sake) about six inches away and the further one (a black one - again, just to be different) about a foot away.
If you look at the red one, the black one will be double. Now look at the black one - the red one will be double. If you didn't see this, then you would have little or no depth perception, and may have a lazy eye.

Binocular diplopia which you refer to occurs in a case where if you look at an object, it appears double - your eyes can't make one picture from the two separate images.

I know it's a longwinded - and probably confusing - explanation; but I hope it's allayed your fears!