:/ getting nervous! Maybe I can't?

Me and my fiancé have been trying for a baby. I was 3 days late and then started today. It has been really light then a lot then back light all in one day. We have tried for over 3 months and I'm starting to think maybe I can't have kids. We do not have the best of jobs so I don't think we will be able to adopt:/ it's starting to scare me. That's all I've ever wanted was to be a mommy! 👪👶💔