I've had a dry nose for weeks now. when i blow my nose i get bloody snot and dried blood boogers. what is this?

Dry cold air?: There are several possible reasons, the most likely is dry cold air. Sometimes dabbing vaseline in nostril can help dryness and inflammation leading to bleeding.

Dry air: When we breath dry air it dries out our nasal passages and causes the mucus that is normally there to harden. Try using a saline nasal spray before going to bed and a couple of times during the day needed. After a few days things should resolve. If not than see an Ear, Nose and Throat specialist for an evaluation.

Humidifiers can help: When the air you breathe is too dry, the mucus in your nose and sinuses won’t filter properly and your sinuses won’t drain as well as they should. Adding humidity to the air with a humidifier is generally good for sinus health. Take care.