Advice please ..very confused :/

I realise so much is up in the air at the moment, but hoping for some advice if possible.

I have a lot of ED visas in my passport, a couple of in/out stamps, one B visa stamp and currently a double entry tourist visa.

I am currently touring around Thailand. I have funds in my bank account.

I recently extended my visa for 30 days at immigration, 1900 baht, but I wish to activate the 2nd tourist visa part before the August 12th clampdown.

I will likely be up in the North of Thailand at that point. DO you think i can do a one day in/out at the Myanmar border? Or would that be a problem? If so i can fly out to Cambodia for a visit (been meaning to visit at some point in any case). Just would be easier if i could do Myanmar as i wish to explore the northern region.

I am going to be taken on within a company soon, and before my next tourist entry expires i shall be going for a b visa and work permit. Just need some advice on this tourist visa 2nd part please, as obviously i do not wish to have any major problems returning.

Thank you.