Need opinions.

Went for my friends first ultrasound with her today to see not one but three sacs. But only sacs nothing else. Her doctor said she could be earlier than she thought since it’s multiples that’s why she got a positive so soon. But based on last period she should be 9 weeks. Had her first positive test on May 4th. Hospital hcg was a 47 on the 8th. Haven’t had any hcg blood tests since. Still having all symptoms & very dark pregnancy test lines. I’ve had a missed miscarriage but i have no experience when it comes to multiples. They are doing another ultrasound next Monday to see if anything has changed. I’ve told her to think positive but not completely lose thought of something happening. Has anyone had this before & everything be okay? I want so badly for everything to be okay.