Hello, I have been taking Sylvie 30 for 5 years. From 10.06 to 15.06 I took Dalacin C-it was just in a 7-day break between blisters. During the use of the next blister nothing alarming happened, withdrawal bleeding was as usual. Unfortunately, after the next blister, there was a strange withdrawal bleeding. It started on time, but instead of lasting, as always, 2-3 days lasts di, today without a break, that is 12 days. This is alternating spotting with gentle bleeding,today a small clot appeared. At the time of taking the last blister I did not use any medication, I did not miss any tablet, I did not vomit, etc.3 days ago I did a pregnancy test, which ruled out pregnancy. I am very worried about this situation. What could be the cause? Could an antibiotic taken two months ago have affected her? Could it be breakthrough bleeding? Can stress exacerbate these spotting/bleeding? I admit that the longer it lasts, the more stressed I am. Please reply urgently.