Get out! It sounds like you are quite used to living with someone with bipolar and you will only truly realise how hard it has been once you leave. You need to find peace and stability. I lived with my mothers bipolar for years and it does get better once you DON'T live with it any more. You are about to be a mother yourself, and you don't want to bring a baby into that environment. I'm 40 this year and still coming to terms with my bipolar mother, but once I had my own place, my own space, peace and quiet to relax in, not treading on eggshells every day, it was amazing, remarkable, priceless, a sanctuary. I hope you find your own sanctuary soon, for your own family. Take care of yourself. I'm not saying don't love your mum, but you can do it sporadicly, when she's having a normal phase, and look after number 1, for a change, at this very important time in your life, when it truly should be about you xxx