D., I hope I can help you. What concerned me most about your posting is not that you weigh too little, but that you have no energy to eat. I suspect that your nutritional needs are not being met. I strongly recommend nutritional supplementation. It's good for everybody, but especially those who have dealt with illness.
The thing about nutritional supplements, is that there are so many options and price ranges that it can be confusing. The most importnat thing is that the nutritional supplements that you take are recognized as food by your body. This is necessary for them to be digested and absorbed properly. A natural, food-based nutritional supplement can make all the difference.
As for weight gain, it's simple math. You have to consume more calories than your body burns. The key there is to consume healthy calories instead of empty calories. You want to gain healthy weight, not just get fat. One simple way to do this is to add healthy, meal-replacement shakes to your diet. Just don't replace the meals with them, add them to your diet.
If you'll go to my website, www.nikken.com/brendaramsey, then click on the box labeled, "Lifestyle Solutions", you'll find a fantastic line of natural, food-based, nutritional supplements. I recommend that you start with the Jade Greenzymes, a young barley grass product that is considered nature's perfect food. Nikken's Jade Greenzymes are harvested at the peak of nutritional content, and cold-processed so that the enzymes stay alive.
Next, I recommend you try the Kenzen CIAGA juice. It is a blend of noni, pomegranate, aloe vera and goji berry juices, along with cherry, blueberry, grape and pear juices — and the combination creates synergy that multiplies the effects of the individual ingredients. Ciaga’s 21 fruit, herb and organic extracts confer the benefits in its name: cardiovascular, immune, antioxidant, gastrointestinal and adaptogenic. It has double the antioxidant levels of ordinary health drinks, contains no added water or preservatives, is all natural, and tastes good. Just one ounce per day is all you need.
Third, the Kenzen Mega Daily 4 multivitamin for women will complete the core nutrition you need. Again, it is all-natural, food-based nutrition that your body will recognize, absorb, and digest properly for optimum benefit. For weight gain, you can add Kenzen Creamy Protein Shakes. These provide healthy, balanced nutrition, and are high in protein, vitamins and minerals. If you'll consume these shakes along with eating a healthy diet, you should gain beneficial weight.
I know this has been long, but I hope this helps. I do need to let you know that I am not a health care professional, but I have learned a great deal about nutrition since becoming a NIKKEN Consultant. Please feel free to contact me for more information.