Trigger * miscarriage impending . Please help

Jade • Momma of both . 💖💙 🤰 w/ 3rd 💚

I found out I was pregnant a week ago . Had my levels checked that day they were only 8 . Two days later 26 . Then two days after on Friday they dropped to 25 . Doctor told me to expect to miscarry . It is now Monday , my levels were checked today and they are only 13 . I have been cramping and hurting since Friday evening but no bleeding at all . Please someone tell me what’s going on !