will i be able to gain weight?

Be aware that if you are looking to gain weight, you should avoid junkfood.

If you are looking for a someone that can give you insight into different medical issues, google, "Doctor Mercola," and look into some of his material.

What kind of foods do you need to avoid?

Some healthy ways to gain calories would be:

Add olive oil, or any non-hydrogenated oil to you cooking. Adding an extra dollop into most foods will add some good fats.

Same with powdered milk. Sprinkle some into whatever you are making. Adds calcium and protein as well.

Avocados. This morning for breakfast I had Egg Beaters (egg whites in a container) with a sliced up avocado folded into it. Absolutely delicious!!

Peanut butter - add to oatmeal or any other hot cereal.

Nuts are a great fat, try to get unsalted varieties for the most part.