OMGoodness ZozoBug! I just took a peek at your shop and I can see why you are so overwhelmed! I started doing children's boutique clothing about five years ago, sold on eBay, was so busy and stressed that I thought I would lose my mind ;o) so I KNOW how long it takes to make one of those twirly skirts, and all the other beautiful items you are creating. Your prices are WAY, WAY too low for the time you are investing.
So . .. . maybe raise your prices, and those who really, really want your designs will come along for the ride. The rest are just looking for a bargain. . . . which is fine, but not at your expense!
Here's another idea: When I couldn't keep up with making all those things (same thing 10 times in a row is NOT my idea of feeling very creative!), I got a couple of emails asking me to write up a pattern for this design or that design - so I started writing eBook patterns. Sure that takes more time the FIRST time you write it, but after that you can sell the pattern over and over (but you don't have to write it over and over!), make a bit of money for your family, be creative and have fun, help others learn how to be creative . . . and not lose your mind! ;o) For whatever that's worth -
