Is there any chance I could be pregnant or am i getting hopes up over nothing?

I know this may be wishful thinking on my part so I thought it would do no harm to get opinions. I have been ttc for nearly 3 years now and have been put on chlomid. I have completed my 2nd course and my period was due yesterday. I know your thinking its only a day but if I have always come on a few days earlier than due. I am having stomach cramps like I usually would at the beginning of my period but no sign of bleeding at all, which usually accompanys the cramps. I just wondered if there is any chance or am I being silly for getting my hopes up, as I have said I always come on 2 or 3 days earlier and was due on yesterday.