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For pain there is nothing you can do yourself with medicine from over the counter..If its this severe I would suggest going to the A&E before it gets unbearable at night. Might need some intramuscular painkillers and stronger oral pain killers
Or a walk in center...You need better pain killers before the pharmacies close
Best wishes. Please feel free to contact me if there is anything else I can help with. Have a nice day.