Am I pregnant? I have been using this period tracker for the past 5 months and it has always been very well accurate maybe my period would be a day earlier than it said it would but that s about it. In mid April I took antibiotics for bv My period was due may 11 and now it is may 15 my app keeps reminding me I m late. However I thought it might be the antibiotics but asked my doc and said it was no way it should have interfered. I have been feel constant cramps and sharp pains on breast slightly tired than usual pretty much regular PMS symptoms but no period I already tested on may 14 but both test were negative Keep in mind we use withdrawal method
Hello and Welcome to ‘Ask A Doctor’ service. I have reviewed your query and here is my advice. Usually menstrual cycle with duration of 21 to 35 days can be considered as normal. The possible causes of delayed periods in your case is bacterial infection leading to some stress and strain which can affect the hormonal balance and sometimes few antibiotics can also affect the hormonal balance in the body especially production of estrogen and can delay the periods according to few studies. As as you took the tablets in the first half of the cycle there is possibility that antibiotics might have affected estrogen which is the hormone of the half. As your pregnancy test kits came negative result  the possibility of pregnancy is less. So you can wait for 3 to 4 days possibly by that time you may get your periods.  If you do not get periods even after that you can take tablets for withdrawal bleeding with your doctor's advice. Hope I have answered your query and  I will be happy to answer any further follow-up queries. Take care.