thanks for writing to HCM
the reason for shooting pain in your ankle can be a soft tissue injury
around the ankle and this means your ankle ligaments or tendons could have got hurt (sprained)when you were playing football.
As you didn't mentioned that in the last 3 weeks you had taken any treatment, so i am supposing that you are not on any kind of treatment.
for this problem you can see a physical therapist who can find out the soft tissue injury and thereby treat it.
if this doesn't help you can go for a MRI
of your ankle to find out the exact cause and can take treatment accordingly.
kindly do not ignore your pain as ankle pain is common in footballers and if ignored it can be problematic for you.
i hope this answers your query
wish you good health