What about going to the Caribbean Airlines desk and check where the next flight out is going to? I mean, as much as you aren't happy with your welcome in Trinidad, even Tobago is nicer and may change your perspective. Or go to another Caribbean Island and try to salvage some vacation. However, you may face a similar reception if you have no hotel.
For future spontaneous travel, these are not developed countries where you can just 'go' with no plan. Though not exactly 'third world' they get suspicious of people just arriving. It might work in Europe and US, and I see you have been to S America, so you may have succeeded there, but I sure as heck wouldn't want to arrive in Venezuela without at least a couple of nights accommodation under my belt. And I would not recommend Africa for spontaneous either. They don't crack a smile, will grill you at best, will remove any camouflage and if unlucky, may start fishing for bribes.