A Million Questions

I am 23 and have been TTC for 18 months. My periods are always crazy so I never really know when they will come. I have gone 2 months without a period. I was getting excited thinking that "maybe.." but ofcourse I wasn't. It seems like every where I look I see pregnant women. I mean even ALL of my girlfriends are pregnant. I've gone through the entire mentality of "maybe there's something wrong with me," but as far as I know everything is okay. This entire process of TTC is so depressing.

And the one thing I hate most is seeing these news reports of new mothers dumping their new born babies in trash bins, parents not taking proper care of their children, parents abusing their children and teenagers getting pregnant when they aren't TTC.. "it happend at a drunken party.". Why is it that the women like us that want to concieve more then anything this world has to offer are the ones with the heart break? Why do we have to endure this? I know I am young and I have plenty of time but when someone knows it's right and they are more then ready (money wise, maturity, loving relationship, a partner that wants to have a child with you as a sign of your love and to know that feeling of parenthood) 18 months is 17 months too long.