Welcome to the site.
I am so sorry to learn about your abuse at the hands of your partner and i believe he himself is possibly suffering from Narcissistic personality disorder and it is his this underlying condition which is making him to subject you to this trauma.
I have doubts about the authenticity of your diagnosis of bipolar disorder and borderline disorder which he himself has given you,the reason behind this is the fact that these two conditions cannot be considered together in the same person as they are almost always mutually exclusive of each other meaning that if one has bipolar disorder then the diagnosis of borderline personality disorder
has to be ruled out and this shows that your partner has probably been hasty and callous in over-diagnosing you with an apparent bias.
So i suggest that you got to take a firm stand against him and stop getting abused and traumatized by his narcissistic governed tactics and most certainly you got to get yourself evaluated by an experienced psychiatrist to rule out these conditions which he has labeled you with.
Other than this i will have to agree to the fact that the voice that you heard could have been an auditory hallucination if at the time of this incident you were abusing methamphetamine.
So i believe a lot of resolutions need to be taken by you to overcome this abuse which is both physical and emotional and possibly a couple's counseling with a psychotherapist or psychologist will be a good way to proceed in dealing with the abusive relationship and his narcissistic ways both of which shall be unraveled and brought to light during the couple 's therapy in front of the therapist / psychologist thereby giving a setback to your partner's tactics using his underlying personality traits. Other than a proper thorough evaluation from a psychiatrist is essential to rule out or rule in the proposed diagnoses that he has used for you because if these diagnoses in the evaluation are ruled out then your medications that you are currently using will be brought off thereby bring closure to the numbing effect of them ( i.e makes you emotional flat / zombie like feel ).Also please seek de-addiction treatment for your methamphetamine abuse.
I hope this helps.
Wish you all the best.
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I hope this he