Help!

Mandy
Went to the ob/gyn cause I just felt so horrible. I'm 5 weeks today. They done an ultrasound, pelvic exam and labs. The nurse practitioner said the ultrasound showed a mass on my left tube and that there was something showing in my uterus but it was still to early to tell. I have to go back to the dr on Friday for more labs and another ultrasound. I'm terrified that it's ectopic like they are thinking. Has anyone been through this? I'm having a hard time staying calm?