Ultrasound at 5 weeks

I’ve been having some spotting but not too much to be of concern. (So says my Dr. And everyone else around me) Everything turned out fine during my ultrasound. They pointed out I had 3 sacs, but I only had one fetal pole. I’m not sure if it’s too early to detect the other two or perhaps they’re vanishing. Has anyone with multiples gone through something like this?