risingsun, I have bipolar 2 and I was diagnosed during my 1 and only trip to the psych ward and that was for a suicide attempt. I was raised in a hell hole and I'm sure that the dysfunction was the trigger that set off the illness. You mention 2 weeks in the psych ward, did you get a referral to a psychiatrist and therapist? If you have a mental illness and remain in that house you need a support system and a therapist/counsellor is a good way to get that. I realize you tried counselling but maybe you didn't click with that counsellor. Try another one and give it a few appts. before you write it off. Those first 2 or 3 can be uncomfortable.
For now don't think about "who" triggered you. Deal with the diagnosis and get healthy.