7 weeks old baby have very bad stuffy noise. it's been 2 weeks. what should we do? i'm very worried.

Stuffy nose: If you have not brought him to the pediatrician for evaluation, please do now. If it's after office hours, take the baby to the ed of the hospital.

Nasal wash/clean air: Babies are nose breathers & very sensitive to odors/fragrance/dust/fumes. The primary source of help is washing irritants out of the nose with saline nose wash (many otc). You also need to eliminate any aggravating agent such as cigarette smoke/ fragrant cleaning products or laundry detergent. If the kid can still feed enough to wet diapers every 4-6hrs s/he can wait to see the regular dr & review.