Do not forcefully blow your nose. If continuous sneezing pinch your nose.
Due to infection & inflammation,due to forceful blowing, there can be blood streaks with mucous.
Normal case, take the prescribed medications, Antibiotics, It should be fine.
Next Steps
If possible do Blood tests.. CBC, Platelet count, Coagulation profile.
Antibiotics, antihistamines
Steam Inhalation, Gargles