Painful sensation after a sexual encounter is normal, as skin is really sensitive in the genital area. As you used condom, there is nothing to worry about regarding vaginal sex. You received oral sex, which exposes you to gonorrhea, syphilis and herpes. You can test as follows:
-3 weeks after the encounter, for gonorrhea.
-6 weeks after the encounter, for syphilis.
-3 months after the encounter, for herpes.