Scared

Shelby
I started spotting Sunday morning at 4 weeks 4 days. It started beige and became a darker brown, but still only the rate of spotting and no clots or red blood.
Today it was much of the same, spotting in the morning and not so much as day goes on. (Today 4 w 5 d)
I had an OBGYN appointment, bloodwork and ultrasound to make sure everything is ok.
Peanut was too small to see, which he said is normal. My cervix is closed, which he says is good. My HCG level for 4 w 4 d is 419. This seems low.
I go back in 48 hours for more blood work. I'm so scared. Is my HCG too low?