Lifelong Prognosis?

I find myself wondering what my daughter's future will be?  She's intolerant of many sounds, and especially words with the "ck" combination.  She's been experiencing more psychosis, possibly linked to an increased use of an inhaler for asthma symptoms.  Her newest tendencies are violent, and as a household, we're struggling with that.  I know stress influences her symptoms, and yet I'm unable to provide a completely stress free environment - we'd need to maintain complete silence, never bring meat into the house, and basically live our lives . . . her way.  Her music, her entertainment choices, her television shows, never venturing out of the house to places she's not comfortable, an impossible task.  She's often afraid, so she can't be alone.

On the flip side, I've been advised to treat her like a normal kid.  Holding normal boundaries, administering normal consequences, or "normal" as typified by our family practices.  But the level of conflict that arises when I do this is horrible.  Screaming, throwing things.  And, the resultant hallucinations?

I'm stymied.  And wondering if she'll always be difficult.  If she'll be able to find enough calm and peace to build healthy relationships.  She can be very sweet and giving.  I've seen it, even as recently as Christmas as she made many gifts for family and friends.  Are we in a very temporary period of trauma?  Will this be a longer period of adjustment, or a lifelong struggle?  I almost wish I believed in psychics and could access someone's crystal ball.