hi.... I got my IUI done on the 23 rd of dec. 2011 ,i was under medication....naturogest 200 mg vaginally, folsafe 5 mg, globac XT, ecospirin 75, and pregnova 2 mg(pregnova taken 3 times daily upto 3rd dec. thereafter discontinued) now on the 10 th of jan was scheduled to undertake a home pregnancy test (not got my period till today, LMP being 7th of dec.).today on 10th the test came out negative with period missing .why.... which medicine might have delayed my period... plese advise