Wanted to add this info from familydoctor.org..... check out the part about the abnormal pap too....
"How does a woman get PID?
There are several ways women can get PID. The most common way is by having sex with a person who has gonorrhea or chlamydia. These diseases are carried in the semen and other body fluids of infected people. During sexual contact, the germs spread to the woman's cervix. The germs can also infect the glands at the opening of the vagina, the urethra (passageway for urine) or the anus.
"Sometimes women get PID without being exposed to gonorrhea or chlamydia. In these cases, doctors aren't sure why the bacteria in the vagina spread into the uterus, fallopian tubes and abdomen, causing PID.
PID can also occur if bacteria infect your internal organs as a result of giving birth, or having a miscarriage, an abortion or a procedure to take a sample from the inside of the womb for laboratory testing. Sometimes PID can occur after the cervix is treated because of an abnormal Pap smear or after the insertion of an intrauterine device (IUD). However, this isn't common."
"Should my partner be treated if I have PID?
If you are treated for PID, especially if it's caused by an STI, your partner must also be treated. Unless your partner is treated, you may be infected again. Making good choices about sexual contact is important. If you think you might have PID, talk to your family doctor right away."