Are you using a weight distributing hitch, or, a standard draw bar type hitch?
As seen in post above, there are draw bars with longer drop.
There are also draw bars, made for weight distributing hitches, that have adjustable height. Check the brand and type of your hitch.
18 Nissan Titan XD
12 Flagstaff 831FKBSS
Wife and I
Retired Navy Master Chief (retired since 1995)