what key am I in?

Hi, could somemone please tell me what key the following song is in?
Am Dm E
chorus Dm C B E
Thanks.

It doesn't seem to be diatonic. There are many ways to look at it, but I'd probably say for the verse the first to chords in C major (A minor) then it modulates to E major. For the chorus same thing; Dm and C in C major, B and E in E major.

Could be a bit tough for a lead if its at a fast tempo, you could just look at each chord on its own and play chord tones.

Make the B a Bm7b5, and you could play A harmonic minor.

Yo!
Yeah, besides that B chord, everything else is diatonic to A harmonic minor.

The moody Mood has returned!

please, I've heard them all.