HCG Level at 4 weeks

Hi ladies,

I recently found out that I’m pregnant, and at 4 weeks right now (9dp5dt), and was told that my HCG level is 42. The nurse said this was completely normal, and I’ll be back in for further bloodwork, but I’m concerned this is low? Earlier this week (over 48 hours ago) I was at 24... I realize I should trust medical advice here, but seeking validation/wisdom regardless🤷‍♀️