4 month trying and just got my period, how do you stay postive?

Steph

4th month TTC baby #1. We are both 28 and have been together 8 years, married 1.5. We waited longer for kids than most of our friends/family our age and now it doesn’t seem to be happening for us. I know it has only been 4 months but I have never felt so depressed or upset by something in my life before. Any ideas of how to stay positive and not stress!? Any help is greatly appreciated❤️❤️❤️