Hi every one!

I'm on my second round of Clomid... I was supposed to be on my periods on the 20/06/2012... but nothing came then I took home pregnancy test the next morning... it showed negetive result... still there were periods or sign of them. On the 26/06/2012 periods came but they were very light, usually first day is the heaviest one, same as the second day... now today nothing is coming out... The thing is I'm never late... this is new to me... can some one help me on this...