Psychosis and tolerance..I need help!

I'm presently engaged to a woman who has been dealing with severe psychosis but it's getting to the point where it's definitely holding us back. It's difficult to move forward in life when your spouse experiences psychosis and living in a world plagued by hearing voices and really bizarre delusions. I am desperate at this point for some advice on how I can help her to come to terms with the psychosis and to finally get help that needs and deserves. I'll try to briefly sum it up...

Up until about 6 months ago we had both been dealing with an addiction problem spanning for just under a decade. Towards the end I would see signs of psychosis but would always try to justify the behavior by telling myself that it was just because of the drugs and it would all be better once we got clean. The past few years have been rough. Not only were we dealing with addiction meth and heroin but we also experienced some extremely traumatic events such as multiple deaths of close friends and family members, as well as pets. Job loss, homelessness, theft, and betrayal were commonplace so of course we both ended up with some trust issues and became even more reclusive than we already were. Each issue I just mentioned had an apparent lasting impact on our mental health but I won't bother going into detail. Although we were both "finally" able to get clean she is still hearing voices and falling for delusions that are effecting everyday life. For example, the voices are actually those of people we knew at some point in our past but she believes they are communicating with her through a microchip and can hear her thoughts and can see everything she does. She says one of the voices insists that I cheated on her and even have a baby with "the voice", although she insists that she's lying to us and she wants a blood test..because the baby isn't mine. And I say "us" because apparently I have a microchip too and she constantly starts arguments because she insists that she can hear me communicating telepathicly with her voices...and nothing I say or do can convince her otherwise! There's about 8 of these voices which torment her daily. She's on SSI for bipolar disorder and PTSD but insists she has no mental issues and I think it's because of a fear of the stigma of a mental disorder. I don't know what more I can do at this point but am willing to do anything except give up on her. She's already been hauled in for a 72 hour hold in the psych ward at the hospital but she lies to them and they think she's ok and they release her with no follow-up.

Can someone please offer some advice? Thanks in advance for any help offered and regardless I appreciate those who took the time to read this!