Trying To Gain Weight

I need to gain weight. What I really want is to put about 20 pounds on but I would settle for 10. The problem: I'm ALWAYS nauseated. It is this nausea that slowly robbed me of a pound here and a pound there over the past 7 years. I often will be really hungry and then when I begin eating my nausea will kick up and I'm not able to eat as much as I want. Complicating matters, I eat really healthy food, all of which are low in calories. My body loves these healthy foods and has actually begun rejecting the more processed, sugary, crap.

Over the years I've tried a couple things to get my weight up but have not had much luck. Just yesterday I began feeling a renewed sense of urgency on this matter. I need to find a way to make this happen. Here are the things I'm currently doing to add calories to my diet:

- I put cheese on almost everything I eat (not breakfast)
- I try to drink some calories by adding juice to my breakfast
- I snack on Wheat Thins
- I try to have a little dessert with both lunch and dinner

My husband suggests that I eat a big snack close to bedtime and I'm going to give that a try. But I'm also open to any suggestions you may have. Have any of you struggled to gain weight? Have any of you had any luck gaining?

HELP!