You're "freaking out" is normal. I recently also made a memory quilt for a friend who lost her husband to cancer. I thought it was awful.....the pictures I printed were bad, stitches were crooked, seams didn't match. But you know what...she LOVED it. They will be wrapped up in his memory, not looking at thread color. Sounds like you have already put a lot of love into it!
I can see ugly stitches on this close-up.
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