Pregnancy test

My hcg is supposed to be going down because she said she is certain it's a miscarriage but she didn't say it for sure she just said she's certain becuz my levels went from 310 to 260 something the top test is the new one the bottom is one from a couple days ago baby hasn't passed through my body or anything also cervix is closed feels like the baby isn't gonna come down any time soon and I'm 4 weeks pregnant and supposed to go back 2 weeks from now for another blood test and ultrasound would u do a heartbeat test to or just forget it? Is the test getting lighter? Last period was September 9th first time being pregnant.