1)
What did Yirmeyah say?
1.
Rashi: He did not say this to Tzidkiyah. Rather, the Navi explained why Tzidkiyah incarcerated Yirmeyah, and returns to explain what Nevu'ah he had (in verse 1).
2.
Malbim: He said that after all this, he had a Nevu'ah that contradicts all these [previous] Nevu'os.
