Eyes won't fixate properly wobbly shaky vision

[Random10]

When looking at objects more than three feet away my eyes (or the image) appears to wobble from side to side up and down, like a home video camera being held by hand. It's just unstable.

Sometimes things appear doubled, and I almost have really off depth perception, like things are close up.

There is also significant visual snow and things seem dimmer.

Following exercise I feel really dizzy and looking at the horizon it's bobbing about all over the place, it's hell.

This is driving me mad, what could be causing this?

I may have had exposure to CO poisoning and also took antidepressants a few months ago.

I saw a vestibular assessment and no nystagmus was observed during her tests, however she did notice eye flicker, stated it was my cervical occular reflex, however I am sceptical.
This is debilitating and driving me crazy please help