Addicted

So here is that time of month again where I should start my period in 2 days and I was so sure I had sex on the right days. (ALL OF THE RIGHT DAYS) and still saying negative. I have a problem. I don't know why i keep taking so many especially since they keep telling me what I don't want to hear. "No- you're not pregnant" jeez! I thought getting pregnant was easy.... Yea not so much.