Hi...based on your history I think you might be suffering from acute exacerbation of chronic sinusitis...in your case the streak of blood in mucus,I think the cause is forceful sneezing(it cause injury to delicate nasal mucosa)...I'll recommend you the following regimen
Next Steps
1)tab augmentin duo 625mg one tab twice daily after food for 5days.
2)tab sinarest one tab twice daily after food for 5days
3)xylomist nasal drops...two drops in each nostril twice daily for five days
4)steam inhalation twice daily
we'll review after 5days
Health Tips
if bleeding becomes more...visit ENT specialist nearby