I have been having a headache almost every morning for the past 5 days. the headache persists for an hour or two and stops without me taking any medication. could this be related to covid-19 or something else ?

Intense headaches: Usually, a new pattern of a headache and waking up from a headache are both concerning findings. You may need an urgent evaluation. Other concerning headache symptoms are when they occur with fever, weakness, numbness, or changes with vision. On the other hand, I have seen these symptoms from neck muscle strains which were of no big concern. You should speak to your primary care doctor.

Headaches: Your headache may be from a variety of causes. COVID is one possibility but the chances for COVID 19 would be higher if you had more than one potential symptom. COVID 19 Sx's may include fever, cough, feeling tired, shortness of breath, muscle aches, headache, sore throat, chills, chest pain, nasal congestion, loss of taste or smell, nausea, vomiting, diarrhea.