Will the Thai Consulate in the US verify my onward travel for a SETV application and is a yellow fever vaccination necessary if I've traveled to Colombia?

Alright I have two questions... Will the Thai Consulate in the U.S. check the validity of my onward travel for a SETV? I got a 24hour cancellation flight out of Thailand before 60 days but the Thai Ambassador is apparently out of town and not processing applications at the moment. I canceled the flight but should I book a new one or just give them my already printed out itinerary for cancelled flight. I leave in 3 1/2 weeks. Also, there was a girl from Colombia asking about yellow fever vaccinations and not being allowed into Thailand. I was recently in Colombia for 2 months. I’ve returned to the US, hold a US passport and will be traveling to Thailand from the US. I do not have yellow fever vaccination. Will the Colombian stamp in my passport raise questions/will I be denied? Thanks.