@SergeantQueen,
Your diet is very unhealthy, and is likely to cause you to develop health problems in the future, if you don’t already have some underlying problems that you might be unaware of.
Instant ramen noodles such as Maruchan, Cup O’ Noodles, and Top Ramen (as opposed to homemade noodle soups that you get at authentic Asian noodle houses, or the type of rice or wheat noodles you can buy dried to make your own healthy soup at home) are one of the worst things that you can eat mostly due to the extremely high sodium content, and the preservatives used to keep the noodles fresh.
More info about ramen noodles:
https://www.cookinglight.com/news/why-is-ramen-unhealthy
If you are not sure of why you aren’t eating a normal amount of food, you should make an appointment to see your primary care physician, and talk to them about this situation, and ask for a referral to a nutritionist.
Except for the peanuts (unless you are eating the salted kind which can also give you too much sodium) the ramen noodles and the sweets are not nutritionally sound, if those are the only things you are eating. They are empty calories.
You need to be eating a variety of healthy foods that give you protein, good fats, complex carbohydrates, fiber, and vitamins and minerals.
On a daily basis, you should be eating a variety of fruits and vegetables, beans or other plant based proteins including nuts, especially walnuts, whole grains (if you do not have celiac disease) low fat dairy products, or milk alternatives fortified with calcium, and if you are not a vegetarian, you should add lean meats, fowl, and fish that are not high in mercury.
It’s OK to occasionally have a dish of ramen noodles, or sweets, but those things should be limited and NOT be your main diet, and you need to add in plenty of nutritionally dense foods.
More info about nutrionally dense foods:
http://healthysd.gov/link_choosing-nutrient-dense-foods/
A poor diet can lead to malnutrition:
https://www.medicalnewstoday.com/articles/179316.php
I hope you will see a doctor and figure out what’s going on. I wish you the best of luck.