ER Visit- 5 weeks pregnant

I went to the ER last night because I had a dull ache in my left pelvis area. While at the ER I had a transvaginal ultrasound. The ultrasound revealed that I have a likely gestational sac within the endometrium with an estimated gestational age of 5 weeks. It also says that it’s too early to evaluate crown-rump length and viability. The report also said I have a questionable yolk sac. Please help what does all of this mean ?