High HCG Levels

Ashley
Hey guys when I took my pregnancy test at home the stick turned instantly. Probably within 15 seconds. And I took it late at night. I've always heard it takes 2-3 minutes for results and your levels are highest in the morning.
Then when the doctor took my urine he told me his nurse said I "lit up the pregnancy test"
I havent had an ultrasound yet. Waiting until I'm 7-8 weeks. But does the high HCG levels at 5 weeks mean twins? Or is that just normal for some women?