Infertile at a young age?

I know I am young, I’m only 21 and so is my fiancé. We’ve had unprotected sex the past now 4 months and nothing.

About 6 months ago I had a miscarriage very early on, and ever since then I just have had a feeling that I can not carry.

Should I see a specialist about my concerns or am I too young to worry?

Thinking about this and the possibility of being infertile kills me because I’ve never wanted anything more in life than to be a mom.