7w 1d after being told I couldn't have children

Morning all,
I was told over a year ago that I wouldn't be able to have children and if I did I may bro carry to full term. After murmurous tests the gynaecologist finally told us that my MRI showed everything looked normal and to start trying. Exactly a year later we are pregnant and now 7w 1d but I can't stop my worrying. Does everyone experience this?