Yeah, Patti, I think your trapunto looks good, but I can see it definitely has shrunk. Did you pre wash the fabric? (Before you started, I mean, if so, it shouldn't have shrunk so much just for the trapunto bit, should it?)
I'm not sure whether you would be happy with a seam across the bottom so that you can retrim - your design will appear to be higher up towards the top of the tri then - will you like that? Might be better to cut your losses with this one, after all, you called it a practice one, didn't you?
Next thought - do you need to wash out the thread at this time? If you are planning on washing the whole quilt at the end, can't you leave it until that point. At least then your fabric will all shrink an even amount.