I'm a Bangladeshi citizen working for the UN, traveling from South Sudan to Bangkok with Ethiopian Airlines and taking another international flight with Biman Bangladesh Airlines on the same day three hours later from Bangkok to Dhaka, but the two tickets are booked separately.
How should I collect my luggage from Bangkok airport and drop it for the Bangkok Dhaka flight? Do I have to clear immigration first in Bangkok, then collect my luggage from the belt and then check in for the Bangkok-Dhaka flight, or there is an easier way? I don't have a Thailand visa.