Anyone else feeling desperate?

I'm starting to feel like it'll never happen to me. All I want is another baby. A bunch of people around are announcing that they are pregnant and I'm sitting over trying my hardest. My doctor told me I'm doing everything right but I don't know. I've been so emotional about it the past couple days. Af is due on the 11th and if she comes again, I'll be so depressed. I'm desperate.