i am 22 year old. I have had irregular periods before.The end of my last period was October 8, 2012. than next month i was not got my period. so after 10 days i took some aryuvedic tablets for 2 day. and than next day my period was start on 19th November, 2012. but now after that month again my periods are not coming. date should be 19th dec, 2012. but its already 20 days and i am not getting periods. and i have had 10 negative home pregnancy test. I don't know what is going on. and i am very tensed. Could i be pregnant ? eagerly waiting for a reply .