Thank you Danielle, for the information.
This streaks can be carbon particles from environment.
If you are exposed to fumes, environmental pollution, then those can be factors.
In some cases,old clotted blood can appear as black particles.
As you feel cold symptoms, fatigue, muscle/ joint pain, periodic fever, there can be sinus or nasal inflammation or infection.
I would suggest to take an examination by doctor.
Doctor can take a few tests & advise antibiotics if there is a bacterial infection.
Please take plenty of fluid.
You can take tylenol or advil cold, meanwhile.
I hope this information helps.
I will be happy to assist, if you need any clarification.
Please feel free for any follow up query.