Hello mummy's I stop bleeding octo 20th after I put to 26weeks baby an…

Hello mummy's I stop bleeding octo 20th after I put to 26weeks baby and I lost her on 14th September I have not see my mesis this month I use pt test to test my urine yestaday it was showing one red line that is negative and my service is not close when ever I wash my viginer and I cheque it is very far that my finger can not even touch it what is the cause and when can I run another pt test again pls I need ur help