A nose bleed? ALOT of blood?

i was sitting at my computer when i thought i had a running nose but it was blood, i've been really sick with what i think to be bronchitis, but i've never had a nose bleed from this sickness before. i've been coughing up a lot of mucus(verys from yellow to light brown).my lungs have been hurting a lot too. my roommate told me to go see a doc. on monday, what should i do? is this normal? (the nose bleed)