Another late period with no pregnancy

Yet again, I get my hopes up because my period suddenly goes off whack. I’m currently 12 days late, have taken two negative tests. This happens so often I can’t stand it anymore. My boyfriend and I have been trying to get pregnant for an entire year with no luck. It’s officially making me so sad to see other people’s babies and all the pregnant women out and about this summer. I think my bf is starting to give up as well. I don’t know what to do to help it happen other than continue to pray like crazy.