Get HCG levels taken or no?

I had a miscarriage back in Apr and now pregnant again. My doc said I could get my HCG levels taken if I wanted to see if they are rising normally before my first appt. Curious what people think about this... what if they’re not normal? Can anything even be done or Would I just sit and wait? Is it just a peace of mind thing? Conflicted over whether I should even do it....