Hi i've been on my birth control pill almost for a year, iam sex active but we also use condoms, few weeks ago I had a kidney infection and I was taking very strong antibiotics, i also took my pills like 12 hours later than i should or even more for about 4 or 5days(didnt have sex tough ,its not pregnancy for sure) so now after I finished my antibiotics i noticed a brown spotting it now lasts about for a week,while on my birth control pill And when I finish the packet I get my period about on the 3rd day,today its the 4th -still no period showing and brown spotting is still occuring. What's wrong?