KeevKK, I would like to echo what the previous responders have said to you. At the age of 22, you ought to be in the prime of your life. It would seem that you need to clean up your body and your environment.
Of course I recommend that you seek a Doctor to assist you.
Start with the body: to clean up your body the best place to start is the kidneys, these can become a major bottleneck if the tubules are blocked. Lots of water will help to flush them.
Research kidney flush. The kidneys and endocrine glands are essential.
Next is the liver, Livers can become full of stones, also the bile ducts.
Research liver detox, you may pass thousands of stones.
Others here have mentioned heavy metals, you might start checking your environment for aluminium and other heavy metals. Like lead. I've been reading about lead used in the manufacture of brass taps. You can purchase lead-free taps, but they are four times the price. And a filter is useless if it's the tap that is polluted. If you work with galvanizedmaterials like nails, you can pick up heavy metals like Cadmium.
Research heavy metal detox.
The skin: dandruff and blackheads are not entirely unusual at your age, but look at it this way; the skin is the largest organ in the body, it gets rid of toxins by sloughing off cells, and oils via sweat glands. If these are becoming clogged up, then where do the toxins go? They will end up in the fatty tissues. You live in Scandinavia, so you can't be far from a sauna. Sauna followed by cold swim, repeat several times. Your skin will love you for it.
Lymph glands. check your glands in your neck and groin, if these are swollen, you will benefit from lymph massage to get your lymph flowing properly. you will need an expert practitioner.
Environment: OK brain fog can be caused by a number of things, here are some ideas. Eliminate artificial sweeteners, like Aspartame, Sucralose, whatever they are calling it these days. Eliminate Fluoride; try to find a fluoride free toothpaste, and if your local water supplies are fluoridated, try to get a reverse-osmosis filter that will get the fluoride out.
Mould affects the body in various ways one of which is brain fog; check your bathroom for black mould, and eliminate it as much as possible. Bleach only bleaches it, orange oil will kill it, clove oil will kill it.
You might also find mould around windows or on ceilings where there is condensation and insufficient ventilation. It's very important that you eliminate it.
Pets. If you are in contact with animals of any kind you may be picking up parasites from them. Tiny eggs can grow into monstrous worms in your body, like tapeworms, there are thousands of types. Cleanliness is next to godliness in this case, wash before eating. You can pick these things up from the very air you breathe. Carpets will harbour them, they may need to be properly cleaned. Steam is good. Clean your floors. Don't forget door handles and railings.
If cleaning, try to use non-toxic materials, I use vinegar and bi-carbonate of soda, and some borax.
Constipation: the enemas recommended will assist, and also the diet. There is a ton of information on the Forum about diet. Do your research.
Breathing: Of course the Forum recommends the EE system. It's available for free. Get the oxygen moving around the body to heal it.
Sleep: Try and achieve absolute darkness, and make your hours regular. The Forum recommends 10:30 PM, and reduce the glare on your monitors and displays for an hour beforehand.
Build yourself a fantastic body, KeevKK.