Elbow and arm pain is not usually a sign of anything serious. If it does not go away after a few weeks, see a GP.
Try these things for a couple of days:
111 will tell you what to do. They can tell you the right place to get help if you need to see someone.
Go to an urgent treatment centre
Urgent treatment centres are places you can go if you need to see someone now.
They're also called walk-in centres or minor injuries units.
You may be seen quicker than you would at A&E.
Apart from an injury, these things can cause arm pain.
Do not self-diagnose. See a GP if you're worried.