I just put up a 14' round above ground pool that is about 42" deep. We layed down 8 7/16" osb ply wood, then layed down on top of that 1/2" insulfoam and taped it together to creat a 16' x 16' area for the pool and then cover it with a 16' x 20' tarp. After filling the pool up about maybe half way I noticed that I am about 3" lower on one side. What should I do? Is there a quick fix? Will it be okay or will it collapse?