hello and welcome to HCM.
Thank you for your query
I can understand your concern about the weight gain.
I would surely help you regarding this.
I would like you to follow the following steps :
1. PATIENCE -Don't get your hopes set on gaining weight in one spot by eating more. The way your body distributes fat is largely determined by genetics, and can't be changed by diet alone.And this requires patience.
2.Set a Goal - Aim for one or two pounds per week. More than that could lead to a cycle of crash dieting, in which you gain and lose weight quickly.I would recommend you to keep a goal of at least of 1.5-2kgs a month,and gradually increase it,every month.
3.EATING HABITS: Eat three meals per day, as well as two snacks. Eating on a regular schedule can help you make sure you're getting enough calories every day. Aim to have generously-portioned breakfast, lunch and dinner, as well as two snacks in between.
PROTEIN RICH FOODS and Protein supplements:
your diet should contain 2 eggs per day,and any one of the following during lunch/ dinner/snacks.
Boiled soy beans
Chicken
Tuna
drink a glass of milk/soya milk thrice a day,with PROTINEX protein powder,add 2tbsp each time.
PEANUT BUTTER in breakfast -One tablespoon contains around 100 calories and has 4 grams of protein. Real peanut butter is also high in
folate,
magnesium,
vitamin E, and vitamin B3. you can also make peanut butter smoothies,and drink from time to time.the recipes available throughout the internet.
Look for starchy vegetables (potatoes, peas,
corn, carrots, winter squash, beets).Choose dense fruits (bananas, pears, apples, pineapple, dried fruit) over watery fruit
Go for hearty cream soups instead of broth-based soups.
When you're cooking, add a generous amount of oil to your food. The healthiest oils are unrefined (extra virgin) oils such as olive, coconut, canola, palm, and (of course) butter.
4.WORKOUT-as you said you still feel weak and tired,i would recommend you to start with minimal exercise in the beginning like cycling in a gym or walking for 20-30 mins a day,and slowly increasing it,and progressing to lifting weights for muscle training.
5.THINGS TO AVOID :
Avoid diet sodas,vegetables that are mostly water (broccoli, cauliflower, zucchini, green beans, cucumbers).
Oil that are high in omega-6 fatty acids (pro-inflammatory) such as safflower, sunflower, and peanut oils. Unhealthy oils that contain trans fats include shortening and soybean oil (aka vegetable oil).
Avoid trans fats. Trans fats can increase belly fat, as well as inducing unhealthy
insulin levels
avoid over eating.overeating and fasting have been shown to have negative effects on
glucose and insulin levels, as well as potentially damaging metabolic processes over a long term
hope this helped.
Thank You
stay healthy.