How would you react?

Have you ever had the feeling that a doctor doesn't want to examine you because you're young and therefore healthy?

The last time I went to my family doctor, he blamed all my symptoms on my smoking / being overweight or something else

Now unfortunately my health has deteriorated a lot and I am afraid that it is something serious and my doctor practically just doesn't care

About my symptoms

long-lasting diarrhea for about 3 months

Lymph nodes on both sides under the armpit have been swollen for almost 4 months, you can see that even without having to have the arm

Constant circulatory problems with the danger that I will fall over, my asthma plays a role, unfortunately I cannot judge whether it is a circulatory collapse or an asthma attack

Extreme weight loss of approximately 19 kilos in 6 weeks without changing your diet

Constant tiredness, feels like someone is sucking my energy away, I often fall asleep while sitting

Clearly visible hair loss,

What should my doctor definitely examine in me

Do you think this is something serious?

What could trigger something like this? It says on the internet that these are all symptoms of tumor formation.