Hitch jack fully extended: Should I be nervous?

The rating of the jack is its maximum rating when fully extended. I don't see what the worry is unless you installed a jack that is rated way below the tongue weight, your loading a couple cubes on bricks in the trailer towards the front, or you just like to worry about things.

One thing is certain. Post up a pic of anything on these boards and folks will be along with a gazillion methods to solve the problem you never had to beging with.