TTC is starting to really get me down!

My husband and I have one child together, who’s almost 2, and we’ve been trying for another for about 8 months. It’s slowly starting to wear me down. I so want another, and it was so easy to conceive my first that it feels like the 2nd just wont ever happen!! I’m late for period today, but even now it feels that the universe is playing games with me and it’ll get my hopes up just to come a couple days late. UGH.