I would try blocking it using moonpi's advice, then I would just bind it and move on down the road. Your DH will love it no matter what because you made it for him and you will just look at it as another little bump in the learning curve of quilting.
I have a stack of quilts here..from my first ones (06 to recently) It is obvious that I am improving....so just look at it as a good thing. Since you did this awhile back...you are just better at it now...that doesn't make that wall hanging "bad" though. I like it!