Want to know abut MTPill?

I am 28 year old married person and i got married on June 27,2008.Due to some misunderstanding i will gave MTPill to my wife without checking whether she is pregnent or not.When she eat medicine she feels lazyness and some headache after that she become normal.No bleeding occur after taking medicine.Her last period occur on February 22 to February 26.We take the medicine on March 4th and yet April 9 period not occur.What can i do sir?Please give me the right advice that what can i do.Also tell me what are the side effect occure due to this.I have very much tension due to this.Please help me?