My last periods was on 3rd of September and it ended on 8th of September. After 2 weeks of it, currently since one week I am bleeding like I do on my periods (blood red sometimes but reddish brown mostly) but only everytime I urinate and not otherwise. I even have been seeing few brown blood spots in my underwear. I am not pregnant neither am I taking any medicine. Although last week I fell ill and had to take antibiotics and cold medicine. I don't understand what is happening.