What should I do if my visa is about to expire in Thailand after my spouse visa extension?

Don’t overstay

Do not overstay - not even 1 day. That is not an option if you want to be allowed back in Thailand in the future.

You should have done the 30’days first and then you could have done another 60 days after that.

And yes, it’s still doable in Bangkok. When I was there last I asked them and had the wife ask them too just to make sure they knew what I was talking about.

Do a quick visarun, don't overtime at all, it makes it harder to continue.

The only extension available to you at this point is the 12 month extension, but it looks like you're not going to be here long enough to complete that as it goes under consideration for 3 or 4 weeks. The alternative is a border bounce for a visa exempt entry. You should never overstay.

You've used all of the extensions you can unless you have 400,000 baht in your Thai bank account and can apply for the 1-year extension.

If you leave and return, you will get a 60 day visa exempt stamp.

You can try applying for another extension that you do not qualify for, and if they accept your application and fee, you will receive a 7 day "extension denied" stamp. This will start on the day you apply, so you would need to do it at the very end of your current stamp. There is no guarantee that immigration would accept this application.

The only extension available to you is the 12 month extension which requires 400k in a Thai bank account in your name for 2 months before you apply. You either leave or try for an extension and hope to get the 7 days to leave Thailand stamp.