Multiple pregnancy tests am I still pregnant ? Any others out there ?

Lonna🇺🇸👸 Nurse !
I found out last Monday that we're expecting . I have tested every day with first response , and clear blue easy up until now. All have came back positive , but the one I tested today was one of the clearblue easy digital , and it came back negative ? Now I'm stressed out over the one negative ! I have my first prenatal visit scheduled for October 13 , but so worried over this! Please any help would be appreciated ! ! I Should I be worried ? ?