My gf is being treated for chlamydia 1x 1000mg azithromycin and 1x 800mg cefixime. it's been a week she has a fever and intense pain, is this normal?

Not normal: See below - it's possible she has pelvic inflammatory disease: http://www.webmd.com/women/guide/what-is-pelvic-inflammatory-disease I recommend she be evaluated urgently by a doctor licensed in your area to rapidly exclude this potentially serious possibility.

Not normal. PID?: If her pain is in the lower abdomen, probably she has pelvic inflammatory disease (PID, fallopian tube infection). The treatment she had is fine for uncomplicated chlamydia (and/or gonorrhea), but not sufficient for PID. She should contact her doctor immediately, or go to an urgent care clinic or emergincy room. This could be serious. Good luck!

No: This sounds very much like PID (pelvic inflammatory disease) which is a common but serious complication from a chlamydial infection. She will likely need a longer course of more intensive antibiotics to get control of the infection. See should see her treating Dr or gynaecologist or visit an emergency department