I handcarved a stamp, a long time ago, just 'doodling' out of my brain, and it looked so similar to this. I had zero idea where it came from or what it could be ... now I want to go see if I can find it again. Love the idea of a fertility figure. The blues in your piece, here, really go with how I, at least, experienced early pregnancy.
I do hope you find your long lost stamp. It's great fun to find art done years ago, and do something with it!