Trump may regret his comments about Comey. Comey can do him a lot of harm in subtle ways. I fully expect him to deny that he told Trump he was not under investigation. And will confirm Trump's effort to have the FBI drop its investigation of Flynn. Doubt that he will comment on any open investigation though. What ever, it will not be good for Trump. 
Mist concerning is Trump's  lack of security in his own advisors or cabinet level appointments, one or more of which is betraying the president by leaking private conversations to The NY Times and CNN. This is unprecedented in its magnitude.