Great Job!! It looks super cute!
About the duplicates, I try to be as original as possible but every so often a design of mine will look similar to something else I saw or vice versa. It's difficult when many people buy from the same fabric sources - but usually there are always slight variations in trimmings, ect. I hope that makes sense.
I haven't been upset when I have the same fabric as someone else or they have the same fabric as me, it happens all the time and it really can't be helped
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Just be as creative as possible for yourself to try to stand out, that is what I try to do as well