Showing early or hidden twin?

Shay
I'm 6weeks 5days and I only feel bloated after I eat but when I wake up you can see a clear tiny bump and when I look down its like my tummy started to round already. I miscarried at 15weeks with my last pregnancy so this technically isn't my first pregnancy. My first scan showed only one but could it be still possibly be twins?
​Anyone else showing early?