Career dilemma

Lately my life face a little bit of speed bump...it is not so smooth especially in career wise. At first im supposed to have job attachment in munich, but it dont work in the end. My application was rejected coz im applying for field that is not related to my current role. I found that to be sad but not much i can do about it.
Im a bit dissapointed with my curret job that is why im planning to change department. It dont work well so far. Honestly im not sure if it will ever work out.
Im planning to break the news to my big boss this friday. Hopefully it will work well.