Beyond bummed...

I have PCOS... We've been trying for over two years started seeing fertility specialist in feb 2015 been on Clomid just did my second cycle of HCG trigger shot n up'd my dosage of clomid this cycle to two pills a day and really thought it was working because my period was late but my dr told me to wait til the 29th before i test so I've been patiently waiting & even though i knew better my hopes started getting up thinking may e it will happen this Month only to come home and find out my period started today... im sooo devastated and discouraged why does this keep happening??? I just feel like this is never going to happen for me