Question?? Y’all know my situation for everyone that commented!!

So i literally had a baby now 4 weeks ago. Y’all seen my other wit the FR positive test so luckily I went to my doctor I was good no infection did blood work it was negative so I was left over HCG in my system they said it can take up to 3 weeks for the HCG to go away. I’ve been testing everyday with FR to see if it went away as u can see it didn’t the other 2 are negative to me. So if the other 2 are negative why does it still pops up on FR IS THE QUESTION???