never thought it would happen to me

How stupid can I be to think that I'd never have a miscarriage because I was fortunate enough to get pregnant and have a pretty easy pregnancy with my son. I was supposed to be 5 weeks pregnant and had a miscarriage yesterday, I knew something felt off and different but I tried to remain positive and hope for the best. We have an appointment on Wednesday to confirm. I feel like I can't even be sad because I have a wonderful little 9 month old to be happy and thankful for.