I don’t see why you are worried so much and so early. You now have a tourist visa, not even a visa exemption. After using this one, you can go to Laos to either do a border run or apply for another single-entry e-tourist visa. I’d recommend the latter, which I did a few days ago after “abusing” the visa exemption privilege multiple times and getting denied entry, given their tightening control over visa exemptions. By the way, next year they probably won’t count your previous year’s entries in the total number. Either way, you will not break their rules. Also, they may be more chill during low season.