I'm terrified I'll never be able to have another

Today I found out I had an early miscarriage and due to me losing a baby due to premature birth I am terrified. I would never tell my boyfriend that I'm this scared because I don't want to alarm him.

I was supposed to start my period but when I was pink blood started to come out and I knew it wasn't right...

So I did some research. I had a positive pregnancy and I am scared now that I for sure lost the kid and terrified that I will never be able to have them.