5 weeks 6 days brown spotting

It started on Monday and has been pretty light all week, only a small amount here and there, but yesterday and today has been pretty bad. It’s always in my underwear and it always drips into the toilet when I go to the washroom and is always on the toilet paper when I wipe. I know that as long as it’s not red I am okay but this is really concerning for me especially since it’s getting heavier. I have my first prenatal appointment tomorrow and will be discussing with my doctor.