Thanks for posting your query.
I think you should consult a doctor.
Yellow XXXXXXX area with a tender spot might be due to infection in the haematoma
(collection blood beneath the skin) at the site of injury.
This could be the reason for shooting pains that you are having.
As far as XXXXXXX head injury
is concerned, the chances are very less likely as one week has already passed.
As you are having severe pain
, not allowing you to work properly, a medical examination is must.
You can continue your activity after visiting a doctor and get treated for this.
In mean time please do following which should help.
Take analgesics you are comfortable with.
Take proper rest
Apply local antibiotic
cream that you have with.
I hope this helps.