Discouraging friends

Crystal
I found out Thursday last week that I was pregnant and was and am still thrilled! I'm 5 weeks and 3 days according to the app and my first doc appointment is tomorrow. Last weekend we told the parents and called a few friends and I was told by one friend,
"Well you shouldn't get too excited yet because you could miscarry..."
It hurt and I know the possibility is there but I am still so happy and believe that everything will be ok....
But now my thoughts are all over the place...help me put my mind at ease?