PISSED

My hubby and I have been ttc for 19 months. My period is due in 2 days, I took a test last night and it was negative. I'm so tired of getting upset every single month.. and plus ALL of our friends that have been together alot less time than us that have recently got married are all pregnant! Just why isn't it happening for us??? Ive had doctor checks and then said everything's healthy. I'm just so down about it.. I keep dreaming taking pregnancy tests and they are positive!!! Sorry for the rant but I just know my period is about to turn up again..😢😢