I had read all the posts and FEEL for you. That was a lot of work but perhaps there is something you can do. Sometimes I deliberately do not pre-shrink because I am going for an old-timey effect. Since we don't know exactly what batting you used, all you can do is try some of the suggestions listed. I would stretch a tarp or something plastic out flat, lay a clean sheet over that and then lay your quilt dampened again with cold water over that. Smooth it out as flat and even as you can and pin or weight it in essence blocking it) until dry. You should be able to square it up pretty much this way and what you would be left with is an old-timey looking quilt! It is all good and will be ok I am thinking.
Another thing you could try if you don't want to go to all the above is to lay out a thick blanket or something, cover it with a sheet, then your quilt and try lightly (very lightly using wool setting) steaming it and pressing lightly. This will flatten it some and allow you to smooth it out and block it into shape with your hands. Let it dry fully before trying to pick it up or move it around.
Best of wishes and Good Luck!