Negative test at home, but my doc got a positive?!

I went it to renew my birth control that I have been on for 14 years and had to do a urine test first. They called and said it was positive and they’re getting me a referral for OB. I haven’t had sex in over 40days (my spouse lives cross country), take my birth control, my period even came as scheduled which the last day was 17 days ago. I was told to test at home for a “double confirmation”. Bam! Tested at home

right after my appointment and I have 2 negative tests! What do y’all think?!