With a liquid nose job would the complications happen immediately or could they appear much later?

I want to get a liquid rhinoplasty to straighten my nose and get rid of a hump and possibly make my nostrils look smaller. I'm scared of going blind but I'd be less scared if the risk was instantaneous and it was going to happen right after the injection, as opposed to randomly going blind months later because I accidentally whacked my nose and made the filler migrate. When do the complications tend to happen? I would get regular rhinoplasty but I'm too slow scared of Empty Nose Syndrome.