i have been having recurring yeast infections off and on for just about a year now and was tested for hiv april 2006 which had negative results. i have used monistat and diflucan (perscribed by my gyn) and it cleared up for maybe 2 weeks at the most and now back again. i had my annual in february 2007 and all came back great in all areas including red blood cells, white blood cells, glucose (77)etc. everything came back as normal. i had a cbc in the past month which results were normal. i also took tests to measure ph level in vagina a day ago and the results show that i have a normal ph balance twice. i have had surgery in the 80s for partial endometriosis, have had 1 ectopic pregnancy about 8 years ago and am now on depo-provera birth control for the past 8 years or so.
my questions are: would i have a normal vaginal ph balance if there was some std present? would having had partial endometriosis and an ectopic pregnancy in the past and having surgery for it and/or being on depo-provera for the past 10 years have any effect on getting these yeast infections? thanks for any insight that you can provide.