Premenopause weight gain

I have to ask, how much weight can I expect to gain? I've gained 25 pounds in the past year. I think that's enough. I gained about 5 pounds when I turned 30. I gained about 10 more before turning 38. Now at 42, it's just out of control.

I don't eat a thing and I'm packing on the pounds. I eat carrots, I eat salad, I eat fruit, cucumbers and still I gain weight. Seven years ago I ate 1/2 pint of ice cream a night and never saw a pound from it.

My biggest fear is that I'll continue to gain. I'll go out of mind if I have to change to the next higher size.

I've never been the type to go to the gym. I don't want to exercise 5 nights a week. It's just not something I've ever done.

I just want my old body size back. I don't care if it sags more. I just can't take the weight gain.

As if infertility wasn't enough, now this. Somehow I can't help but think, if I had been able to have children, this would all be a right of passage. I'd have something to show for all these years of hormones, etc. Instead, all I have is a body that's getting older, never did what it was suppose to do, and now it's going on to the next stage of life and gettig fat. I have no reference for a body that changes, like one does with pregnancy. I'm just going from what I considered a normal body to an old one.

Help!