Help…

Possible miscarriage tw:

Okay so I’m a bit confused because I went to the doctors because I thought that I was having a miscarriage because I have been bleeding and cramping and my hcg level was at a 15 and half when they gave me an ultrasound (picture below) that information was given when I was seen there and supposed to go back tomorrow for another blood test to check hcg level and make sure it drops down to normal. However im skeptical and confused…I took another test and it was positive but the line got darker…and then I took a digital after peeing 7 times in a day and still says pregnant WTH is going on??? Anybody else experience this?