How To Cure Intense Pain In Neck,back And Head?

I have been prescribed Percocet/Acetomenephin 5/325 from my dentist after the removal of a tooth, however right before I have an prgasm I get an intense pain shoot up thwe back of my neck into my head and throb like mad. I quit taking the pills after I found this out, had only taken maybe 3 of them all together and it has been over 24 since my last one and the pain still happens. Is this normal?