Maybe miscarriage..?

Whitney

Should be about 6.5 weeks but started bleeding a week and a half Ago for several days. Last week my numbers were 4.5 for progesterone should be 20, hcg was 703. Went back two days later and my number only went up to 709. Went back two days later (which was Friday) they are now over 1300. Still not doubled yet and had cramping with some blood Friday night. Anyone go through something similar? Have an ultrasound on Thursday to see what’s going on