If it was a sneeze, I wouldnt be worried about just 2 sneezes. But if you noticed other breathing issues or excessive sneezing then probably get her respiratory system checked.
However, it could've been the "throwing up sound". That sort of sounds like a sneeze, but they are more of exhaling/forcing out their air really fast to dislodge what ever came out of their stomach (their stomach will sometimes expel something, but leopard geckos dont have a gag reflex, so they have to "cough" and shake it out).
If you had observed it happening, you might have seen it suddenly shake it's head violently when the sneeze sound occurred - thats how they force out the un-stomachable food.
To see if it was throwing up something, check the entire enclosure for dead prey. Whatever you typically feed her - crickets, mealworms, a waxworm, etc., just look for it dead, possibly a bit moist still, and probably in an elongated postition (it went down and came up the throat).
If you dont find anything, then either A: it was just sneezes, or B: it managed to swallow down the food again and never fully threw up.
But dont panic! Even throwing up is relatively normal. Typically that means they either ate something too big or they ate to much. You only need to be concerned if you notice they are throwing up often/in a row.
Good luck!
