Very hard to know what to say. I keep writing long posts with too much detail and no substance and then deleting them.
Ok. I think I have some mild form of bipolar disorder. I think we've been living with it for a long time (went to a doctor 10years ago about it and got laughed at).
I need to see a doctor.
Sometimes I talk without stopping. Inerrupt and don't listen. can't have a conversation, as I keep changing the subject and talking non stop.
At these times I'm irritated. I always criticise. My children are worn down with the constant criticism. I have really, really tried not to. I've really tried to build in praise and saying nice things and asking them things. They hate it. One DC is ill and cannot wait to leave home so they don't have to live with me anymore. 
I get racing thoughts. I get grandiose thoughts that I can start a new career in a completely new field. It has changed what it might be yearly, monthly, weekly... now daily!
I'm restless and move my hands around when I talk. It bothers my children.
I'm not really much of a risk taker I don't think.
I also have down times, usually every evening. I can't think of anything to say to anyone. I have no energy to get up and do any house housework, even clear away plates or a spot of ironing. My days are easy. I still feel drained. Slow. Sometimes I feel really worthless, numb or as if anything I do would be harmful. I go to bed to avoid doing any bad.
I cry for no reason.
My DCs have had enough. I've been thinking all this time that if Im not ill, we just have to live with it and make the best of it. Be tolerant. (I know!)
I've asked my DH today to support me in going to the doctor with a list and tell them. Ask for an assessment. Is that what I should do.
How do I make this right? Is there any treatment? Even if there isn't, I think I owe my DCs at least the knowledge of an assessment, maybe a diagnosis. I owe myself and my DH a concrete reason for my not working full time.
I have no friends. I need some MN friends to help me make some sense of all this and give me the courage I need to see the doctors and what to say.