Emergency contraception is aimed at contraception after the event. As for the medicine you mentioned, it is for the treatment of gynecological inflammation and can be used during this period. There is no contradiction with the medicine you take orally, and it does not affect contraception.
Suggestion:
Suppositories are generally recommended to be used at night before going to bed. You can use them at night, which has nothing to do with taking birth control pills and will not affect you. However, if you have gynecological inflammation, you need to pay attention to contraception and temporarily avoid pregnancy.