Please ease my mind!

22 years old, and just suffered a miscarriage with my first pregnancy last December. Today i went to the doctors for unrelated reasons and happened to figure out I was between 4 and 6 weeks pregnant. They did an ultrasound and see a probable gestational sac in my uterus, but they also mentioned that it may be ectopic. I'm still waiting for my blood hcg results. Do you think my baby is okay, and just to little to be seen right now? Or should i be worried? Please ease my mind!