the VISA stuff in this country is very complicated. And the VISA exempt is just as hard. I left for 4 months and came back to visit and nearly was denied. I had to plead with immigration, as my daughter was on a different flight and was about to visit for her first time. Furthermore, they shouldn't be upset at people living here. It only benefits the economy.
Who plans trips, specifically 2 days longer than their Visa allows? Why? Do better.
Answer to your question. Yes.1,900 baht at immigration for a 30 day extension. Or over stay 2 days, pay 1,000 baht fine, but get flagged in their system as an overstay and get an overstay stamp. It's worth the extra money to avoid that. Next time plan better.