hi ! due head injuries many conditions occur in the body as the brain receives shock and as u have said u had a clot in brain that is the main reason that leads to different troubles. u need not worry about it, it can be cured completely.
Next Steps
consult a good homoeopath in ur vicinity, or else u can consult me thru contact or mail i can guide u for the treatment.
Health Tips
observe if there any after affects in your body other than loss of smell like memory becoming weak, headaches, nerve pains etc, etc and report to the doctors immediately, so that they can analyse and treat u at the earliest.