Its not probable, its a fact. Whats not a fact is us knowing how long the gap is. As I said, it could be mere minutes, or much, much longer.Sure a gap between the Rapture and the Tribulation is possible. S
A debate could be made as to when the earliest signs of the tribulation began, but would likely be just speculation.
I dont understand your confusion of what I stated so I hope the above clarifies.