It is very common to experience ear heaviness or pressure after recovering from COVID-19. The virus can cause temporary inflammation in your sinuses and Eustachian tubes, leading to fluid buildup. This is highly likely a lingering effect of the virus rather than a reaction to your multivitamins or Rosuvas F (rosuvastatin and fenofibrate), as these medications do not typically cause ear symptoms. To help relieve the pressure, you might try gentle steam inhalation. Since this has persisted for 12 days, please consult a doctor or an ENT specialist to check for any fluid or mild infection behind your eardrum. Rest assured, this is a very common post-viral symptom and usually resolves with time.