Hello
You are having
pelvic inflammatory disease , reasons of this infection may be , these includes.
Bacterial as
sexually transmitted disease ,
urinary tract infection , gynecological infection , fungus infection , candidiasis , etc.
When such patient visit in my clinic I advise them to get in swab examination for culture and sensitivity test ( swab from
vaginal discharge). I usually prescribe ciprofloxacin+ tinidazole ( combination pack ) one tablet 2 times in day for 10-14 days or till complete relief.
Also take some frluconazole 150 mg 2 tablet stat.
Local
vaginal tablets ( mycostatine or povidone ) , insert these tablet into vaginal orifice and lie down for 1 hour for 5-6 days.
Local hygiene is very much important.
Now a day local vaginal wash solution is also available , use it .
As you mentioned that you are having trimethoprim+ sulphamethoxasole tablet but in my opinion this is not for gynecological infection ( not a choice drug).
Hope this information will be helpful for you.
Still no relief then consult a gynecologist and get his opinion.