Can't believe it, I'm pregnant.

After trying for 18 months I got a positive pregnancy test today. I am 45 years old and my partner is 38. It will be my third child and my partners first. 
I stopped eating gluten a couple of months ago since I realised it gave me joint pain. Not sure it helped but since gluten increase inflammation it might have helped. 
I am 5,5 weeks pregnant now. 
Right now I feel happy and very nervous.