Losing faith

I have PCOS and me and my boyfriend have been trying for a really long time now.. I will be going to the doctors sept 22nd to now be put on fertility pills but yesterday I just started my monthly . I'm honestly laying in bed right now balling (happens every time I get a Peroid) because I just don't understand what is wrong with me and why I just can't have a baby , I'm starting to just lose faith in myself . I can't even do what a woman should do and this kills me ... I'm just so hurt and I get so sad and disappointed when I start my Peroid and I feel like no one understands and I'm stupid for crying 
I'm not fishing for attention guys I'm legitimately upset and needed to vent