Don't stress it! If the husbandry is spot on the snake will eat when it wants to eat. I know it's easier said than done Mine hardly ever refuses meals and she did today and it got me stressed a little bit but temps and everything check out... I'll try again next week and I'm highly doubting there will be any issues. I'd leave her alone (no handling, going in and out of the enclosure, etc. unless necessary such as for water) for 5 days or so and try offering an appropriately sized food item then.