Becca congrats!! I don't know if you will see this as I see the original is a few days old, but as somebody else said my hcg was lower with my second and the sickness was worse than with my first, where I had extremely high hcg...both were boys. I am currently 10 weeks with our rainbow babe and again my levels are quite high, yet sickness has been minimal. I really don't buy into the whole girls cause worse sicknesses than boys, as I know many who had horrible sickness with their boys and nothing with their girls. I really think it's just the way individual bodies react to pregnancy.
As for the sickness I have some new insight that may help you out! We switched to a new doctor this time as I needed a dr to be on my side in regards to morning sickness and not brush it off like my last dr did. Anyways he suggested that most women who suffer from extreme sickness during pregnancy have a bacteria called h pylori in their systems, which reacts negatively with hcg. The hcg basically causes this bacteria to flourish in the gut, causing excessive symptoms. Their are tons of mom blogs out their that discuss h pylori and hyperemisis, and what kind of natural treatments you can do to control it. It's nothing crazy, mainly just adding lots of good bacteria to your gut to help fight off the bad h pylori, using coconut oil, apple cider vinegar and probiotics. I've been using those three this time, and have gone from vomiting 20 times a day to only twice a day, and good lord what a relief it is!! It all could just be coincidence that my sickness has slowed, but it might be worth looking into if you don't want to go down the miserable route again.
There is also a line of products called the pink stork on Amazon that was created by a female doctor who suffers from hyperemisis and it appears to have great reviews.
Good luck and happy and healthy 9 months to you