Chemical - Help please

I had a positive test 5 days ago with frer and wondfo early detection so 6mui and 10mui on expected period day definitely pink and definitely there on multiple tests but faint, the lines then dissapeared which I know is a chemical after having 3 in 10 months :( .... But im not sure why my period hasnt come yet?

No sign of it, I have had stronger lines with the previous 3 and my period has come a day after every time...I guess I'm asking if anyone else has gone through this please ...Thankyou ❣️😞