I really don't know how to use it so I followed the instruction I've read on the Internet that it should be taken with 4 tablets every 12 hours. After using it after a month, I didn't experience the so-called 'withdrawal bleeding'.

I'm 3 weeks delayed. I took PT last August 16 and it was negative. I'm confused about the delay of my period and it's making me worried. Am I pregnant or is it the pills? I don't feel any pregnancy symptoms. I took 4 tablets of Nordette-21 every 12 hours and I do it everyday for a month. I just stopped after I took the PT. Am I overdosed? Please help me.