Dear Mr Akshat
> The sequence of events is highly suggestive of head injury
. There could have been internal bleeding
then / or later outside the brain coverings, that has increased in size subsequently.
> This should NOT be TAKEN LIGHTLY - You MUST SEE A NEUROLOGIST
IMMEDIATELY - You need an examination, followed by CT scan
of your brain. If there is nothing, well and good / Treatable condition should not be missed... It is better to be safe than sorry