@Lo**
just so you know, seeing as you're on an extension of stay based on studying (at โรงเรียนจุดประกายภาษา ปาย) you need to cancel that extension at the immigration office with documents from the school before you try to exit the country by land.
Some borders won't even let you stamp out at all if you don't cancel your current extension. Just letting it run out doesn't cancel it officially..