Dear patient, the normal vaginal discharge is clear, white, thick or thin, non odourous and not associated with any itching, where as an abnormal vaginal discharge is yellow or green in colour, with or with out foul smelling , with or with out itching and with or with out lower abdominal pain . The abnormal vaginal discharge usually resuts from the infection in vagina or infection in cervix,uterus and fallopian tubes which is called pelvic inflammatory disease (PID). lower abdominal pain is usually associated with PID than with the infection in vagina alone so in your case chances of PID seems more than the infection in the vagina alone as your vaginal discharge is yellow in colour, itchy and associated with lower abdominal pain even if it is not foul smelling .PID has no relationship with the implant removal but may be related to IUCD, number of sexual partners, general hygiene mantainance, douching techanique and other factors. So you can have a gynecological consultation done where by the doctor may advice you following test and treatement . USG abdomen .Urine routine and microscopy .STD screening tests .Cervical swab for gram stain and culture and sentivity .Mean while you can receive following treatement .Tab ciprofloxacin tinidazole , one tab twice daily after meals . tab doxycycline 100 mg twice daily after meals . tab buscopan one tab thrice dail after meals before taking the tablets make sure that you do not have any allergy to these medicines and you are not pregnant