Um always sick such as laryngitis, urinary tract infections, . etc, is there any medications to improve my imunity as doctors toll me that I need that?

No. There are not any medications that can improve the effects of your immune system. The best way to have a healthy immune system is to exercise regularly and follow a healthy diet. Rarely, Allopurinol can suppress your immune system. Ask your doctor if this is possible in your case.