Can an infected bartholin cyst cause a miscarriage? Never had children or any miscarriages that I know of. I m 26. I ve always had regular menstral cycles. I started my last period July 7, ended on July 13. Noticed the Bartholin Cyst (1st one I ve ever had) on July 21. Started 2 antibiotics along with an antibiotic shot on July 24. Had the abscess lanced on July 25. Started bleeding heavily again on July 27. I spoke with a nurse today about maybe the antibiotics throwing off my menstrual cycle. She said my physician said that shouldn t happen & suggested I take a pregnancy test. I used an E.P.T. & it came back negative. I don t have insurance & I don t want to go back for another round of appointments if I don t have to. I m trying to figure out if I may have miscarried or if I m taking the test too early since my period should not have started until next week. Or if I m just having a normal early period. Thank you.