Still getting positive tests after miscarriage

I had a miscarriage on March 1st this year. I bleed and what not. I was told my levels were going down so I was hoping everything would just go back to normal.

Well we were only so cautious once we started having sex again because I thought surely I can’t get pregnant while getting over a miscarriage. But now I know people have gotten pregnant right after having their miscarriage.

Well here we are almost an entire month later and I am still getting positive tests. They’re not lightening at all either. They did lighten for a few days and now the lines are dark again.

I have called and tried to talk to the Ob-Gyn I was sent to but no response. I have went for labs every week since this happened. Now I don’t know what to do.

If there is anyone who has any advice or helpful information that would be great.

(First pic is from a few days ago. Second pic is today and both are from first morning urine.)