Will I receive a 30-day visa upon re-entry to Thailand by land, or only 14 days?

Hi. I came into thailand with a two month visa from penang which i could extend in Maehongson another month. It runs out on 14th march, my flight home is on 29th. So i will have to leave the country for visa run. I'm on koh phangan now, thought goin hatyai and back within a day, but i need to know if i would get 30 days when entering landway?

If i only get 14 days it wouldnt be enough until my departure, and i heard there is nothing like overstayfee 500 bht anymore.