Hello dear,
Since it has already been more than 03 hours, & you are not having any aggravation of symptoms, you can go to bed.
The bump formation on forehead and pain is due to the impact as well as accumulation of fluid & blood.
The blood cells accumulated are eventually broken down and absorbed in the body.
But this is a slow process & takes times to disappear completely.
Till that time, symptomatic relief is obtained by analgesics preparations (like
paracetamol), ice compression & adequate rest.
If it still persists or there are any other associated symptoms like
fever,
vomiting,
dizziness,
loss of consciousness, convulsions, etc...then it will be better to consult your Doctor.
Under such circumstances, a proper clinical+ radiological evaluation will be needed to rule out any pathological cause for symptoms.
Till then, maintain adequate hydration & nutrition status.
There is no need to worry, you will be fine.
Wishing you a good health.
Take care.