 [ Symptoms ] if you have sexual intercourse while you have your menstrual cycle can you get pregnant i am talking about bleeding heavy an your having sexual intercourse [ Disease ] this is a good question because benadryl is not a nasal decongestant and will do nothing for the stuffy nose not to mention this medication should not be given to a child this young  you want to use saline drops to help thin out the mucus in the nose and then use a nasal aspirator to help clear the passageway i also recommend running a vaporizer in the baby is bedroom    that usually helps a lot as well for congestion parents need to be very careful about cough and cold medications in infants and children so take the time to talk to your pharmacist