That is why nutritionists and dietitians exist, and you should always consult with them before going on a dieting journey.

Ya don't gain weight over eating by itself. You've gotta eat specific foods, and you gotta make sure you're not expending more than the amount in energy. So find fattier foods, you might be eating too much fiber which can be a significant change.

Although I sympathize, I really can't believe that this is irreversible. Seriously. People lose and gain hundreds and even thousands of pounds.

Try going to a gym? Muscles weigh more than fat.

Not gaining a single pound is heart breaking when quality of life is hindered without it. Eat healthy & keep good thoughts, you can achieve it.