I am so exhausted and sad

We have been trying to have a baby since September 2016. Found out we were pregnant March 2017, miscarried April 2017. And have been trying since. And nothing. Have had all my lab work done etc. I’m just so devastated every month. I’m 9DPO and just took a test bc I’m an idiot, BFN. I just can’t believe I can’t get pregnant. The first time with my daughter was a breeze. This time is hard and heartbreaking every single month. I just don’t know how much more I can keep trying.