Go to an Immigration Office to apply for a 30-day extension at a cost of 1900 Baht. You will need some documents to supply your extension. You can google the Thai immigration website for this information.
Doesn’t the 1 year, 90 days, multiple entry visa still exit for non-O marriage/family VISA still exist? It’s maximum 90 days stay, go somewhere, return for another 90 days, do it again and again within that 1 year period.
When you return to Bkk as a Canadian Passport holder from Laos, you will get a 30 day visa exemption. You can go to immigration to get a 30 day extension. If you leave Thailand after that 30 day extension, you can fly out to a nearby country and return again for another 30 day Visa exemption.
The automatic gates do not give you a stamp in your passport but a digital stamp into their system. If you need a physical stamp in your passport, go to the immigration desk instead.
It is suggested that you contact a Health insurance Agency based in Thailand. They have all the answers for you. You can google this information for best answers.