Brave and open post, can't offer you anything other than best wishes but if your post is anything to go by you'll do alright. Having had various very close relatives suffer from other types of mental illness I hope you get the support you need. Don't let the professionals fob you off.
Huge respect to you for posting 1066gull. I don't have any experience of what you're going through but have recent and very close family experience of severe depression and other mental health issues. Diagnosis is always the first step - sorry this took so long and that your mum didn't get the...