What happens if I overstay my visa in Thailand by 1-2 days?

Looking for overstay advice (1-2 days)

Hi everyone, sorry if this topic has been done to death. Here's my situation:

- I work in TH, had the proper non B visa and work permit

- Found new job

- New employer wants me to completely reset visa etc by cutting old paperwork and going to Laos

- Cut the old work permit and related visa, the documents tied to first employer, yesterday the 9th of june. Stamp in passport says 9th of june is my exit date

- Have a bus ticket ready for that evening, but realize I won't arrive at Thai-Laos land border untill morning of the 10th

- Ask officers ar Chaeng Watthana if it's an issue. They say "no, maybe you have to pay a 500 baht fine, but no problem"

- So I get on the bus, arrive at the land border on the morning of 10th

- Get told: "Overstay, pay the fine in Bangkok at airport and fly out"

- Get on first bus back

- First available flight leaves early morning of the 11th

So now the question:

I reckon this will lead to a fine of at least 1000thb right? Two days of overstay. That's okay with me.

What I am more concerned about is a potential ban. Is there any realistic chance this affects my ability to return to Thailand?

This is the first ever time I had an issue like this, hence not knowing anything.

Thanks for your help!