3 weeks after miscarriage... possibly pregnant again??

KJ

So my miscarriage start on August 28 and the bleeding stopped on the sep.2 I have been getting blood work done since the 28th.

My numbers

8/28-6746.2

9/3-200

9/9 -18

Is it possible I could be pregnant again if I had a negative test on the 11th

And on the 13th

Then a positive test today (15th September)