venting

how is it people who aren't even trying can get pregnant? How is it that people who are on drugs and doing things they shouldn't can get pregnant? why is it after almost 3 years we still can't get a positive test. every month I'm truly happy for everyone who gets their BFP even tho I'm crying because we can't. I truly feel like it's some sick joke by the devil that we are desperately trying to have a baby yet we can't but people in our life around us who don't even want one or aren't trying can get pregnant. I'm truly miserable and have decided to sleep the entire day away and maybe week. this month has truly just been my breaking point. thanks for letting me vent.