Chemical? But bfp getting darker?

I was told at 10dpo this Monday that I was “never pregnant” by the obgyn on call. I had faint positives on 3 different tests at 9dpo and 2 more positives on Monday morning. I started spotting and now since then bright red medium flow, no clots. The on call checked my hcg and it was 19.7 on Monday (10dpo). When I told her I was bleeding she said “your labs indicate that you’re not pregnant” (they consider over 25) and that I had false positives and was on my period. They did not want to check my labs again 48 hours later. Fast forward to today (Wednesday 12 dpo), the bleeding continues, slowed some overnight, cramping not quite as bad. I’ve been thinking this whole time it’s a chemical based on the bleeding and cramps. Since they weren’t going to recheck my labs I thought I would take a test last night and it was darker than when I first started bleeding. I took one this morning and it was even darker. Not as dark as the control line but nonetheless darker.

I’m going to call today and ask for repeat labs. I just wanted to see if anyone had any experience with this? I’m preparing for the worst and have been since the bleeding started. It’s definitely not spotting, more like period without clots, but bright red still.