First things first, just in case you haven't stopped already............you need to stop. Snorting cocaine repeatedly causes holes in the nostrils and causes your sinuses to mess up big time. From the orchid recovery center, and this isn't just a made up thing to scare people
"Most who use cocaine snort it and because of this suffer from nosebleeds, sinusitis, hoarse and sore throats, and stuffiness and runny nose. In severe cases of long-term use, cocaine will erode the mucous membrane on either side of the septum and create a hole in the cartilage that divides the nostrils. This can lead to lifelong problems with nose whistling, secretions, crusting and nosebleeds. "
Another dangerous things about cocaine is how it effects and blocks the brain from making natural chemicals like serotonin.
Another thing, is when you share straws, it can be like sharing needles because STD's and other diseases like hepatitis can be transferred. When people snort coke excessively, it can cause nose bleeds and like in your case where you have massive mucous build up the blood can be mixed in, so you might not see a person have a bloody nose, but it dosen't mean if you use a straw after them, you can't catch some diseases.
It is time for you to see a doctor. When your sinuses are disturbed to this degree, it's important to get help before your condition gets worse.
This isn't probably what you want to hear, but it's what you need to know.
This site is great for support, I think you know as well as I do, it's time for a major change in your life. This place can help. Compassion, love, and support await you, I hope you do what you know has to be done. It's time to quit.
Have you thought about stopping?