Im stopping ttc :'(

So this month I really thought I had it and I was gunna be pregnant. But instead I ended up starting my af this morning. During the tww I usually have PMS! Craving chocolate, very sore boobs, etc. I had absolutely nothing this time which started to get my hopes up a little bit. I even spotted one teaspoon that looked brownish two days ago. Which never happens. I am so frustrated and upset. Everyone else around me can get pregnant but not me!