The symptoms of patient are more important than a MRI report...we never go just by a MRI, it is an over sensitive investigation for sinusitis. So even if you have a mild cold it can show mucosal thickening of the sinuses.
So, my advice would be not worry too much just on the basis of MRI report
Next Steps
visit a nearby ENT doctor once lockdown is over and things are safe
Health Tips
take steam inhalations and drink plenty of fluids