u/Far-Surround-1202

I had a medical abortion at 4 weeks last week with the pills. I tested that day so I could track my hcg. It's been 6 days since and I tested again and the line is darker! I'm freaking out that it didn't work. I bled for one day with some clots but then it stopped. They said thats normal at 4 weeks and it likely passed, but then why would I be having darker lines on pregnancy tests :( anyone with experience w this??