Hcg levels? Twins??

Luna🥰

So, I went to the hospital on Thursday, found out I was pregnant (they said probably around 4 weeks, period was due yesterday, Lmp was January 20th)

My hcg levels were at 580

I was told to get my levels checked in 48 hours, so today I went back to the hospital to get my levels checked

I was told it should double

My hcg levels today (48 hours later) were at 1,669

My friend is convinced I'm pregnant with twins, but I'm not so sure 😂

I do have at least 3 sets of twins in my family.

Is it normal for my hcg levels to almost triple? Do you think I'm pregnant with one baby, or twins?