My Wife Was Diagnosed Bipolar About 7 Years Ago. She

My wife was diagnosed bipolar about 7 years ago. She was on lithium or a year or so and when she moved into our house got off of it. Said she felt fine. Recently we were close to having a baby and had to wait a bit longer because I did not get what I was promised at work again. We were then planning on moving out of state in a few months. As this was all being talked about and she was acting so happy, one night she said she was so unhappy with me and wants a divorce. I was totally blindsided and she said because I would pick at her. I said why didn't she talk to me and she said she was scared I blame her. I tried making sense to her how upset I was and of course would never intentionally hurt her and just stressed. For a few days she went back and forth what to do and even had a panic attack. It just all seems so irrational. We have been together since she was 15 and she is now 29. I have always been there for her and did everything for her. Her mom and sister never were and she ran to them now. Her childhood was very hard too. She had an abortion before we met and years later told me she believes she was sexually assaulted at a party too. She has written off people before like her father. Her mom divorced four times. I just have been severely depressed and so confused she could do this like she did and never once come to me over something that is a small issue. She says though she is no longer in love with me but always will love me. I come from a very stable family that she was very close too. I guess I am wondering if she was diagnosed before does she always have it? And can this be a really bad episode? She denies it but it's not her.