Need help what to expect

My FET was 11/29. My first hcg was 31 on 12/11, 59.91 on 12/13, 140 on 12/15.

I went for an ultrasound on 12/21 where I was marked to be 5w6d. They didn’t say how it measured but there was just a little sac. My hcg measured 968 that same day and I had taken a home test that was a little darker than faint.

They sent me an email saying my ultrasound did not demonstrate a viable pregnancy so they will monitor my levels to make sure it reaches less than 5. So expect to miscarry I suppose.

I took a home test today and it was a dye stealer. What could this mean?