HCG levels in early pregnancy

Hello Glow community!

Just had my early pregnancy confirmed this morning at 23 ml? I’m roughly 5 weeks. I feel like that’s low but the doctor didn’t seem concerned and told me to come back for my first viability appointment. Progesterone came back at 27 which is normal for this time.

What is your experience with low levels at 5 weeks? I’m afraid to take another test because the test I took yesterday afternoon was blazing bfp and this morning was much lighter.