Undetermined first scan

Went in to the dr today for a first scan I should be around 6 weeks 3 days.. I’m hoping I’m just too early. Dr could not get a good view of my uterus.. we didn’t see anything not even a sac. I’m am going for a more in-depth ultrasound next week to rule out ectopic.. I’m hoping and praying we were just too early.. last blood draw on Feb 14 was hcg 3300 up from Feb 9 which was 913. Took more blood today to be sure hcg is rising.. I’m just soo lost.. I’ve never had this happen even with 2 miscarriages they were able to see something