Been there, done that, own several of the t shirts. I absolutely HATE Hate hate to unsew my quilting! But I've done it. Now I'm a bit more careful smoothing and pin basting and checking the underneath side before I just go to town quilting. Set it aside for now, then when you are ready, take it outside on the porch, kick your feet up and rip that sucker out so you can fix it. It'll be well worth your time :D