Chemical pregnancy?

Maddie • Mama of a beautiful boy & angel twin boys💙👶👼👼🤍👼 Still trying for baby #2🌈🤍

I’m worried I may be having a chemical pregnancy. Got a positive test at 16dpo, I then started spotting brown so I took a few more tests. My tests now seem more faint and I still have brown spotting sometimes only when I wipe. This is my second pregnancy and it was not like this for my first. I’m now 19dpo but I already have a lot of symptoms, sore/tender boobs, frequent urination and already nauseous. Has anyone went through this? Not sure if it could be a chemical if I still have all these symptoms. Calling my doctor tomorrow. First picture are the first tests I took. Second is my most recent. With my first pregnancy my lines were way darker at this point