 [ Symptoms ] had i pill after unprotected sex but did not get periods on time why [ Disease ] most sore throats are not strep and unless your strep throat was confirmed by a lab test we may not be sure that you even had it if you did it can come back i do not know what you took for treatment you may need to have a throat culture to determine the organism causing your symptoms but many will be viral i do not know your age but mono can cause a severe sore throat and mimic strep so if this is a concern your medical provider should also test you for mono