My wife has to have some mental disorder going on with her

Sunday before last, she had returned from a week-long visit away and when she did come back, she was being all sweet and pleasant for a good few days. Later that week, however, she started getting mean and only got worse over the weekend. Much worse! This past Monday, she suddenly snapped out of it and has been being decent again since. I know she has some issues but she could very well be bipolar or something. I have no idea, but this isn’t the first time she’s rapidly switched gears on me, seemingly out of nowhere. I might have my own issues too, but I never go losing my shit over her one day then being totally okay the next. Regardless if she has anything serious going on, she does have a problem that I wish she would take care of. I can't force her to, of course. But I've warned her about this: one day I'm finally going to have enough and leave her. I think it may take for that day to finally come before she starts taking it seriously... Assuming she would.

She has been being okay lately, this is just a thought I came to mind is all. We'll just see how long she holds on to this better attitude.