Best advice! Call them and see if they will work with you. Even though the trial is over, etc etc. No company wants to see their clients unhappy. They may have a more economical solution for you than going the route of a complete new mattress.
Plus, read this thread on pillows, just… in case.
Also, check everything. Look at your foundation. If slatted are the slats less than 3" spaced. Rotate the mattress, sleep on it a couple of days. My good friends were telling me at dinner recently, their mattress is only a year old and beginning to become uncomfortable. They bought it at a local PC Richards or some place like that. They couldn’t remember what brand they bought, they can sometimes be a bit clueless. I asked them when they last rotated the mattress. Deer in headlights!!! They rotated the mattress this past Sunday. Monday I get “THE” text. OMG, feels like a brand new mattress.
You dont want to try just any random topper. Just like you need to be critical about selecting a mattress and pillow, the topper is just as crucial. Firmness, pressure relief, posture and alignment, are all connected with the topper. Many ultra high end mattresses are actually designed around the topper it comes with.
You should consult with the TM you bought it from and get their advice as I mentioned.
Best of luck!
Maverick