Doctor said quantitative beta hcg levels low

My LMP was April 28. I had a positive ovulation test on May 12. My first positive pregnancy test was Friday April 21 (with early first response pregnancy test). I went into the doctor that day snd they tested my hcg. It was between 5-25. I tested 3 days later and it was 33. Then 2 days after that was 95 (at 4 weeks). The doctor wants to check again in 1 week (at 5 weeks). She said it should be 10,000 at 5 weeks and if it hits that number she will do an ultrasound for dating and viability. She said that 95 was very low number for 4 weeks and is concenred. I don’t think my dating is off because I was monitoring my cycle very closely and I got a posting test last Friday.

I’m so worried and going crazy this week of waiting! Does anyone have experience with low hcg numbers but still more than doubling? And one that went on to a healthy pregnancy and baby?