please help! has anyone else.....

Got pregnant after a miscarriage but before AF
Currently in that situation but people have been telling me that it's probably my hormones still from my previous pregnancy. 
I had bloods done after my miscarriage that showed my levels had dropped from 140 to 40 overnight. And I took a test two weeks after and it was negative. 
Took a test yesterday and there's a vf line. 
Rang early pregnancy unit and they've told me to take a test next week and then give them a call, any idea what they'll do after that?