So I tried on my size 12 jeans today. It wasn't pretty, but I did get them buttoned and zipped! I have a world class muffin top at the moment, but my size 14's are too big, so I will proudly sport my muffin top in my size 12's!!!
I'm in between sizes like you. Some stores carry "in-between" sizes. I've had luck finding size 13 in a brand called BeBop. Also, sometimes LEE Comfort Waist pants are super comfy and not too expensive. I can usually fit into size 12 comfortably.
So cute Mozzy! Just put on a sweatshirt or a sweater and no one will be any wiser! Plus they will all be looking at your butt sporting those tiny jeans. Yay you!