Hcg 0 but positive pregnancy

lo

I had my chemical pregnancy last week and the other day they made bloodworks for me and the result is all normal hcg is completely down to 0 (zero) according to my dr. And said i can't get positive pregnancy result anymore because bloodwork are back to zero means not pregnant.But i still keep testing and i still get positive result .1st picture taken the other day morning urine.And 2nd picture taken today early morning urine. anybody experienced this?