Smegs, I didn't try to ttc for long, but I do identify with not believing you're pregnant. I was so terrified before the ultrasound that the person doing it would say 'umm you silly git, you've just imagined it all'.
All I can advise is to write down all your symptoms, and just do a home test every few days (you know, just to see it again) - so you know you're not making it up!


Anyway, Congratulations!! You're not crazy, you're very blessed. All the best with your pregnancy.