Actually I had abnormal discharge with my endo and cysts. I can remember times before and after I was diagnosed with endo that I had trouble using the bathroom before during and after my periods.
that covers endo symptoms, but cysts can cause discharge. Endo has often been mistaken fir UTI's too, which would cause burning while urinating. I guess I ask this because I'm not sure how educated a cheap clinic would be about endo and cysts. I suppose a bacterial infection would be pretty easy to diagnose though.
I was very curious about your post and looked for it and this is something I found on the internet
as far as Chlamydia, the bacteria initially infect the cervix and the urethra (urine canal). Women who have symptoms might have an abnormal vaginal discharge or a burning sensation when urinating. When the infection spreads from the cervix to the fallopian tubes some women still have no signs or symptoms; others have lower abdominal pain, low back pain, nausea, fever, pain during intercourse, or bleeding between menstrual periods or after intercourse.
as of endo:
Pain before and during periods
Pain with intercourse
General, chronic pelvic pain throughout the month
Low back pain
Heavy and/or irregular periods
Painful bowel movements, especially during menstruation
Painful urination during menstruation
Fatigue
Infertility
Diarrhoea or constipation
In my opnion, I think the biggest difference is they way chlamdia starts showing signs, because endo patients don't have abnormal vaginal discharge or the burnign sensation while urinating....only painful urination but only while having your period.
As far as a diagnose, chlamydia is simple to diagnose with laboratory tests. Some tests can be performed on urine, other tests require that a specimen be collected from a site such as the penis or cervix. So I don't think is common to misdiagnose it, can happen, but I don't think is common.