Is my gecko pregnant? the moist hide is full of sand?

SOMETIMES LIZARDS LAY EGGS THAT ARE NOT FERTILE. I HAD A FENCE LIZARD LAY EGGS AND IT WAS NEVER AROUND ANY LIZARDS FOR AT LEAST A YEAR. BEING AS YOU HAVE BOTH MALE AND FEMALE GECKOS, IT MAY BE POSSIBLE FOR HER TO BE PREGNANT. YOU MAY NOT SEE MUCH INTERACTION BETWEEN THEM BECAUSE THEY ARE NOCTURNAL. YOU COULD TAKE IT TO A VET, OR JUST WAIT A COUPLE WEEKS TO SEE IF IT LAYS EGGS. IM NOT SURE IF THEY LAY THEM IN THE SAND OR NOT. MY FENCE LIZARD LAYED THEM UP NEAR THE LIGHT. GOOD LUCK