How do you keep positive?

Generally, I've not been TTC for very long. Today is my DH's birthday and it happens to fall on Father's Day. I thought how perfect it would be if I could tell him I was pregnant today! It's 3 days until AF due, and Glow told me to take a test today. I've taken a test...and it's another BFN
I know it's my own fault for putting way too much pressure on myself to tell my DH today, but I can't help but feel down about it. Anyone have any tips for keeping positive?!