They ( thai immigration) wanted to send me back to oz two years ago. I came with a one way ticket no visa but had a lease agreement on my apartment in kanchanaburi. Took me 45 minutes before they stamped my passport with a 30 day visa. I went straight down to Pattaya saw my visa agent and got a new retirement visa
I think you have amnesty check with immigration worst case 500 baht a day re over stay and possible deportation back to your country of origin, tread lightly