Transplant medications needed soon

My wife and I have been touring SE Asia this. Winter and find ourselves in Bangkok during the COVID 19 crisis. We are due to fly  back to the USA  March 31 but if Trump locks down the borders who knows.
I am a 25 year renal transplant survivor I brought enough meds for the trip and a bit, but if we are stranded for months I will need more, specifically cellcept and prograf or their generics.
How can I get them? I presume I'll need at script from a doctor...any other transplant survivors here can give me some info?

You may go to drug stores opposite to the Siriraj Hospital and show your previous prescription to the pharmacist. If one don't have it, go to next stores. They might advice you to see a doctor in case prescription is needed.

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