Hello Icc,
I sympathize with you because I have a similar situation but I am the wife, and the "Jekyll-Hyde" one is my husband. I made a post on this site in the "Love" Forum under "Understanding Your Partner" called "Ex-Con husbands mood swings" if you'd like to read it. He does the same thing you describe your wife doing. He can be the nicest person to everyone else but I guess I am the one he "dumps" on when he's having a bad day. Although my husband doesn't usually say "you don't love me", he usually puts me down verbally or insults the way I do things if it's not the way he would do them when he is in one of his moods. His moods change with the wind and are very unpredictable. I do the same thing you do.... I have named his moods, too, and prepare myself for them. He has similar ones to what you described. Anyway, since hearing this probably isn't helping you ---I just wanted to let you know that you're not the only one. I think what it comes down to is whether or not you want to stick with her even if she never changes. That is what I'm trying to figure out. But it seems that every time I try to follow through with leaving him, I know I'd be miserable without him so I keep plugging along. Since you are not married yet you are in a much better position. You have the power to walk away right now and it will be so much easier than afterward. I know that dealing with it is awful and makes you feel bad about yourself. If I would have paid more attention to the red flags in the beginning, I probably wouldn't have broke it off, but I definitely would have waited before marrying to see if he changed after working with his anger management. You might try suggesting a second opinion from a different doctor than the one she's seeing now, and offer to go with her. This will let her know that you care. Also I find that as hard as it may be, the nicer I am to my husband, the nicer he is to me because he begins to feel guilty for his moody actions. He has told me before that it is extremely difficult for him to say "I'm sorry" and his way of saying that is saying "Do you want to go out for awhile?" Weird I know. Maybe she has that problem to? Does she act controlling toward you? I also find that if I do random things for him that I know he'll appreciate, he tends to soften his tone. I hope things get better for you. You are the only one who knows how long you can put up with it..... Good luck!!!
Princess777