@Laura *********
okay, then you got plenty of admitted stay left. No need for a border run. However it would be a good idea to ask Ranong Immigration, just in case. You cannot border bounce to Myanmar up north. You would have to use a land border to Laos. However it's the same over there: They will tell you to use an airport and fly to Laos instead, as on some borders the Thais won't allow you to make a same-day border bounce. Check a few visa advice groups on the latest news