Topic: stuck in kolina forest>after defeating tret

[Dogafin]

after defeating tret, i am stuck where you go down this small staircase to the left down a stream with a broken ledge, half submerged in water and to the right of the stream there is a log on land, the log that i have pushed in to get to the other side of the stream isnt there anymore, now i am stuck, how do i get across the stream and out of kolima forest???