Blood test results are in.....help please !!!

Sam🎀👶🏻
I am nearly 4 weeks late for AF and my blood test results came back today.
All they have told me over the phone is: 
They have come back normal, however one thing has flagged up and you need to see the doctor. They said they can't say anymore as they are not medically qualified. 
What do you think this means?!  If I am pregnant is this how they would approach it??
Xx