Antibiotics should clear up both chlamydia
and pid. .P.I.D is a result of your
chlamydia going untreated for too long.
It is completely possible that you have
had chlamydia for 5 years without knowing.
Chlamydia itself doesn't typically have
symptoms, but pid can result in permanent
damage and possible fertility.
You should be having annual pap smears,
which would have detected chlamydia and
prompt treatment would have prevented
pid.
If you and your partner have been having
unprotected sex then it is extremely
likely he has it too, and should be
treated regardless.
Avoid having sex at all or use condoms
while you're both taking the antibiotics.
Then you should be scheduled for another
test to confirm that the chlamydia is
completely gone (sometimes 1 round of
antibiotics isn't enough).
If your partner has it (which is extremely
likely) and doesn't get treated, he will
just give it back to you.... then left
untreated your pid could get worse.
Since you are sexually active you should
be having annual pap smears.
Here's some reading:
http://www.cdc.gov/st
d/PID/STDFact-PID.htm