Please don't worry!
You maybe having , what is called Atrophic rhinitis! or rhinitis sicca!
Atrophic rhinitis is a chronic condition in which the nose becomes dry and may be a primary disorder or due to some other cause like surgery or infections or nutritional deficiencies.
In rhinitis sicca, there is dryness and crusting due specially in hot and dry weather and this may cause discomfort and nose block
Ideally in such a case, I would do an endoscopy
on your nose and see what is the problem and guide you further.
You may also have to do an xray to look at your sinuses
and blood tests to rule out secondary causes of atrophic rhinitis.
Once the cause is known, you can be treated!