Worried about lines

Hi ladies. I just found out 6 days ago I'm pregnant. What are the chances of still having a chemical pregnancy? My period was due 2 days ago and never came. My lines have been staying the same for the 6 days now.  What do you ladies think? Am I at risk for a miscarriage? I've already had 2 chemical pregnancies. And also my clearblue digitals are still popping up pregnant 1-2. I would be about 4 weeks and 2 days pregnant today.