Anyone know which key i'm in here?

You're in E minor, you said it yourself.

The A#/Bb might just be a passing tone between an A type chord and a B type chord, so I wouldn't put too much stock in the blues scale

E G A A# B D E D B Bb A G E

just yet.

Possible scales are

E F# G A B C D E - Natural Minor
E F# G A B C D# E - Harmonic minor
E F# G A B C# D# E - Melodic minor

many others besides

E F# G A B C# D E - Dorian Minor
E F G A B C D E - Phrygian Minor
 
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