Among sexually active 18 year old women, at any point in time at least 5-10% are infected with chlamydia or gonorrhea. Either of those STDs could be causing your symptoms. Your partner's assertion she doesn't have an STD doesn't mean much unless she has been tested and found negative since her last sexual exposure to someone else. You should promptly (within the next couple days) see a health care provider knowledgeable about STDs. The best bet for expert care probably is your local health department STD clinic.
The chance your partner has HIV, or that you caught it, is very low, but if you want special assurance, you might want to be tested for HIV 4-6 weeks after the exposure. The provider who tests you for gonorrhea and chlamydia can provide further guidance.
As you should have known--and certainly know by now--condoms aren't only for pregnancy protection. Not using condoms because somebody is using other birth control is dumb.
Best wishes-- HHH, MD
As for her pap every 2 weeks, i highly doubt this.
HHH, MD