Wow you're expecting soon? Congratulations, @orangina. I have never come across Redbubble before so I do not know how to advise. But I love your design of the platypus. It looks really cute. Most importantly you have fun doing it for your child. I used to design my own onesie too for my boy before he arrived and customized it with his name. Such a fun thing to do.

Enjoy the last leg of the pregnancy! :)