Is it normal to be so worried?

[Macca79]

Hi all

This is my first post in this section. I am currently 5 weeks with bub number one. DH and I have been TTC for four years with 6 months assisted reproduction. This little one came along when we were taking a 6 month break. So for us it really is a miracle that we are expecting. The only shadow on my joy is an intense worry I now have of miscarriage, Im so scared that after so long DH and I will have this taken away from us. Im trying not to think like this but find that these sorts of thoughts are floating around in my head. How can I stay positive and what can I do to make sure bub stays were it is?
Jen