Many thanks for your question.
I am so sorry that you have experienced this often very painful condition. You are correct in saying that pelvic inflammatory disease inhibits conception, however there is still a remote chance that there may be a pregnancy with what you have mentioned, and also with you having been on a pharmaceutical antibiotic. Therefore, I do recommend that you have a pregnancy test done please. You may use one of the home pregnancy test kits for this purpose, but do test the urine before 10 a.m. in the morning, as this is the time that the human chorionic gonadotrophin hormone (HCG hormone) is raised when there is a pregnancy. If done at a later time in the day, you may end up with have a false reading either way. I recommend that you do the pregnancy test for peace of mind as well, due to your concern.
I wish you well, and hope that you fully recover soon.