Madam My Wife Was To Get Her Periods On Feb

Madam my wife was to get her periods on feb 26 ....but she was to attend a marriage in family.....so she took norlut n for teo days...on 25 and 26 ...but she didnot gat her periods till today i e 2nd of march.....prega pregnancy kit shows two lines one dark and other fainter.........i want to know that if she is pregnant ...then will these tablets could do any side effects to foetus