Might want to list type of trailer!
But no matter, that sounds like a lot. How old? Could be a bad spring. A month ago, my right sagged about one inch lower than the left; but easy to diagnose with all the noise it made. Right spring was broken, left was not in good condition either. So installed two new springs and all is level now.
And I have to ask, tires are the same size?
Trailer: Lifted 228BH, heavy duty springs and Yokohama tires
TV: 2016 GMC Sierra Z71 4x4 CC, SLT
Spare TV: Two Alaskan Malamutes
Living somewhere in ID; previously lived in Moab UT; previous to that, don't ask!