Please help

I found out I was pregnant March 15 after my first cycle of IVF (fresh transfer). I had my first ultrasound yesterday at 6.5 weeks and all they saw a gestational sac. Nothing else. They don’t think It looks very good but they want me to come back Monday for another scan. I am completely broken and numb. How am I ever going to get through this. We do have 6 embryos frozen but i am terrified something is wrong with them and I’m debating on getting them tested. If anyone can give me some advice or hope I would appreciate it because I’m totally broken.