Rinse your nose and paranasal sinuses as you feel your nose blocked due to dust or flu(common cold). Most of the acute sinustis attacks an be treated by rinsing the nose. But if you have a deviated nasal septum or hyperthrophic inferior turbinates you might need operation. Please visit your doctor for recommendations.
If you wake up tired every day this can be a result of unsatisfactory sleep. Sleep can easily effected by blocked nose. Please get your nose checked by your doctor. Septoplasty may solve your problems