Had sexual activity on Feb 4th and taken I pill within 72 hours after 6 days I got bleeding on 11th feb which was actually my due date... the bleeding was normal for 4 days and in the month of march I got bleeding on 8th but the bleeding was normal for first on and half day after that it was hardly bleeding... now it's 16th even now I am getting brown curvical muscus wenever I go to washroom...and my stomach is burning like anything and my breasts also started to burn... please tell me what is it? I had taken urine pregnancy test on 24th Feb in lab it came negative...