Miscarriage question -trigger warning

My sister was recently pregnant but had a miscarriage (she thought she was around 10/11 weeks but baby stop developing at 6 weeks)

That was about 3 weeks ago & she took some pills to have the miscarriage go faster.

She texted me & said she got her hcg levels tested & they were at a 2 & she’s getting faint lines on a couple pregnancy test.

What does this mean?