HCG feeling hopeless

I just got my HCG at 4 weeks and it was 35. Anyone else have a low number then a normal pregnancy? I was told it only matters that the number doubles, and I know I'm a late ovulater so probably earlier than 4 weeks but I just wish it was higher 😓. Thank ladies. 
Thank you ladies for all your kind words! Update my level went from 35 to 159 in 46 hours!!! Gonna take a deep breath and try to relax.